A Search Service for Abbreviation / Long Form

■ Search Result - Abbreviation : IN

Search Conditions:
Search Keyword : IN
Search Method : Exact match.
Research Area:

Results:  
Hit abbr.: 3 kinds.
(Click one to see its hit entries.)

(Appearance freq, Descending)
Abbreviation: IN
Appearance Frequency: 2229 time(s)
Long forms: 392

Display Settings:
[Display Entries]
Long Form, 100 entries
    (Appearance freq, Descending)
Long Form, all entries
[Entries Per Page]
 per page
Page Control
Page: of
Long Form No. Long Form Research Area Co-occurring Abbreviation PubMed/MEDLINE Info. (Year, Title)
integrase
(1051 times)
Virology
(265 times)
HIV-1 (199 times)
RT (152 times)
HIV (68 times)
1989 Secondary structural analysis of retrovirus integrase: characterization by circular dichroism and empirical prediction methods.
inulin
(80 times)
Nutritional Sciences
(19 times)
MD (6 times)
EGF (5 times)
FFA (5 times)
1975 [Kidney function and arterial acid-base status during continuous stimulation of the carotid chemoreceptors in vagotomized cats].
indomethacin
(48 times)
Pharmacology
(15 times)
4-Me (6 times)
CML (4 times)
COX (4 times)
1981 [Effect of prostaglandin-synthetase inhibitors on responses of segments of coronary arteries to 4-methylesculetol and/or to angiotensin II].
interpositus nucleus
(48 times)
Neurology
(21 times)
CS (7 times)
CRs (6 times)
DN (6 times)
1980 Single muscle organization of interposito-rubral projections.
interneurons
(38 times)
Neurology
(13 times)
CR (3 times)
LGN (3 times)
PV (3 times)
1982 Neuronal and synaptic organization of the lateral geniculate nucleus of the tree shrew, Tupaia glis.
infantile nystagmus
(35 times)
Ophthalmology
(22 times)
FRMD7 (3 times)
VA (3 times)
logMAR (2 times)
2006 A developmental model of infantile nystagmus.
inattention
(31 times)
Psychology
(14 times)
ADHD (24 times)
HI (20 times)
SCT (7 times)
2006 Interpersonal callousness, hyperactivity/impulsivity, inattention, and conduct problems as precursors to delinquency persistence in boys: a comparison of three grade-based cohorts.
intraepithelial neoplasia
(31 times)
Gastroenterology
(9 times)
CRC (4 times)
GC (4 times)
BE (3 times)
1992 Transcription patterns of human papillomavirus type 16 in genital intraepithelial neoplasia: evidence for promoter usage within the E7 open reading frame during epithelial differentiation.
integrase protein
(22 times)
Virology
(10 times)
HIV-1 (8 times)
HIV (2 times)
ASV (1 time)
1991 DNA binding properties of the integrase proteins of human immunodeficiency viruses types 1 and 2.
10  inferonasal
(19 times)
Ophthalmology
(12 times)
ST (16 times)
IT (14 times)
SN (13 times)
1996 Visual fields measured with double-arc perimetry in eyes with threshold retinopathy of prematurity from the cryotherapy for retinopathy of prematurity trial. The CRYO-Retinopathy of Prematurity Cooperative Group.
11  intact
(18 times)
Veterinary Medicine
(9 times)
UC (5 times)
LH (4 times)
FSH (3 times)
1983 Effects of unilateral castration and unilateral cryptorchidism of the Holstein bull on plasma gonadotropins, testosterone and testis anatomy.
12  interstitial nephritis
(18 times)
Nephrology
(6 times)
GN (5 times)
pSS (3 times)
TBM (2 times)
1986 Characterization of mononuclear cell subsets in renal cellular interstitial infiltrates.
13  Indiana
(17 times)
Virology
(4 times)
VSV (7 times)
NJ (6 times)
IFN (4 times)
1992 Interferon induction by viruses. XXI. Vesicular stomatitis virus: interferon inducibility as a phylogenetic marker.
14  infundibular nucleus
(17 times)
Neurology
(4 times)
NPY (5 times)
MBH (3 times)
ME (3 times)
1976 Hypothalamic and hormonal control of the photoperiodically induced vernal functions in the white-crowned sparrow, Zonotrichia leucophrys gambelii. 1. The effects of hypothalamic lesions and exogenous hormones.
15  image noise
(16 times)
Radiology
(13 times)
CNR (7 times)
CT (6 times)
SNR (6 times)
2009 Impact of image noise levels, scout scan dose and lens shield on image quality and radiation exposure in z-axis dose-modulated neck MSCT on 16- and 64-slice Toshiba Aquilion scanners.
16  Indigo naturalis
(16 times)
Gastroenterology
(6 times)
UC (11 times)
AEs (2 times)
AhR (1 time)
2014 Distribution study of tryptanthrin in rat tissues by HPLC and its relationship with meridian tropism of indigo naturalis in traditional Chinese medicine.
17  ADHD-inattention
(14 times)
Psychology
(12 times)
HI (11 times)
ODD (11 times)
ADHD (7 times)
2002 The influence of ADHD-hyperactivity/impulsivity symptoms on the development of oppositional defiant disorder symptoms in a 2-year longitudinal study.
18  integration protein
(14 times)
Virology
(8 times)
ASLV (1 time)
ATA (1 time)
HIV (1 time)
1989 The avian retroviral integration protein cleaves the terminal sequences of linear viral DNA at the in vivo sites of integration.
19  immunonutrition
(13 times)
Neoplasms
(3 times)
EN (3 times)
CI (2 times)
ERAS (2 times)
2010 Immunonutrition in gastrointestinal surgery.
20  inorganic nitrogen
(13 times)
Environmental Health
(10 times)
ON (5 times)
TN (4 times)
TP (2 times)
2008 Measurements and characteristics of nitrogen-containing compounds in atmospheric particulate matter in Beijing, China.
21  ice nuclei
(12 times)
Chemistry
(5 times)
ABIFM (1 time)
BET (1 time)
CCN (1 time)
2008 Heterogeneous ice nucleation in aqueous solutions: the role of water activity.
22  integrase enzyme
(11 times)
Biochemistry
(4 times)
HIV-1 (4 times)
BC (1 time)
gRNA (1 time)
2005 Model of full-length HIV-1 integrase complexed with viral DNA as template for anti-HIV drug design.
23  intramedullary nailing
(11 times)
Orthopedics
(7 times)
NSA (2 times)
BP (1 time)
CI (1 time)
2001 Intramedullary nailing in the treatment of aseptic tibial nonunion.
24  immunonephelometry
(10 times)
Biology
(2 times)
HPLC (4 times)
IT (3 times)
AusDiab (2 times)
1982 Influence of molecular size of IgA on its immunoassay by various techniques. III. Immunonephelometry.
25  integration
(9 times)
Science
(3 times)
HIV (2 times)
BA (1 time)
HIV-1 (1 time)
1989 Structure of the termini of DNA intermediates in the integration of retroviral DNA: dependence on IN function and terminal DNA sequence.
26  ileal neobladder
(8 times)
Urology
(3 times)
SN (6 times)
CIC (1 time)
CM (1 time)
2001 Colonic metaplasia in the long-term follow-up of the ileal neobladder.
27  internal
(8 times)
Botany
(3 times)
DV (5 times)
Ex (3 times)
SYP1 (3 times)
2008 Genetic control of floral zygomorphy in pea (Pisum sativum L.).
28  interpositus
(8 times)
Neurology
(4 times)
DN (5 times)
RN (3 times)
TC (3 times)
1985 Synaptic organization of the cerebello-thalamo-cerebral pathway in the cat. I. Projection of individual cerebellar nuclei to single pyramidal tract neurons in areas 4 and 6.
29  interventional nephrology
(8 times)
Nephrology
(5 times)
ESRD (3 times)
HD (3 times)
PD (3 times)
2002 Diagnostic and interventional nephrology.
30  infundibular
(7 times)
Brain
(2 times)
PVN (4 times)
CART (2 times)
ICo (2 times)
1978 Ultrastruct of the hypothalamic neurosecretory nuclei of the dormouse (Eliomys quercinus L.) in the awakening and hibernating states.
31  intermittent normoxia
(7 times)
Pulmonary Medicine
(3 times)
IH (5 times)
CH (3 times)
OSA (3 times)
2007 [Interleukin-6 and tumor necrosis factor-alpha levels of endothelial cells in different hypoxia modes: in vitro experiment].
32  ice nucleation
(6 times)
Microbiology
(3 times)
FTIR (2 times)
INA (2 times)
INP (2 times)
1998 Detection of variation of the R-domain structure of ice nucleation genes in Erwinia herbicola-group bacteria by PCR-RFLP analysis.
33  indolicidin
(6 times)
Biochemistry
(4 times)
iNOS (2 times)
NO (2 times)
AMPs (1 time)
2007 Cathelicidin-derived Trp/Pro-rich antimicrobial peptides with lysine peptoid residue (Nlys): therapeutic index and plausible mode of action.
34  inferior-nasal
(6 times)
Ophthalmology
(2 times)
IT (5 times)
SN (5 times)
ST (5 times)
2013 The locations of circumpapillary glaucomatous defects seen on frequency-domain OCT scans.
35  inhalation
(6 times)
Toxicology
(1 time)
CT (2 times)
Ex (2 times)
FB (2 times)
1999 [Propofol for intubation of infants after halothane induction].
36  inhibin
(6 times)
Endocrinology
(4 times)
db (1 time)
GC (1 time)
GnRH (1 time)
1990 Hormonal regulation of gonadotropin-releasing hormone receptors and messenger RNA activity in ovine pituitary culture.
37  inhibition
(6 times)
Physiology
(1 time)
BM (1 time)
DA (1 time)
GCS (1 time)
1993 Thalamic VPM nucleus in the behaving monkey. II. Response to air-puff stimulation during discrimination and attention tasks.
38  inorganic N
(6 times)
Environmental Health
(3 times)
ON (4 times)
AP (1 time)
BD (1 time)
2012 Soil changes induced by rubber and tea plantation establishment: comparison with tropical rain forest soil in Xishuangbanna, SW China.
39  instillation
(6 times)
Pharmacology
(3 times)
BALF (2 times)
LPS (2 times)
ALI (1 time)
1992 Accumulation of Cd(II) in the CNS depending on the route of administration: intraperitoneal, intratracheal, or intranasal.
40  interlocking nail
(6 times)
Veterinary Medicine
(5 times)
FMC (1 time)
IC (1 time)
1995 Septic complications after interlocking nailing of the tibia.
41  ischemic nephropathy
(6 times)
Nephrology
(3 times)
RAS (3 times)
AAA (1 time)
BP (1 time)
1992 Prevalence of ischemic nephropathy in patients with renal insufficiency.
42  isoniazid
(6 times)
Microbiology
(2 times)
AAT (2 times)
FA (1 time)
MB (1 time)
1984 "In vivo" inhibition of murine liver aspartate aminotransferase by isoniazid.
43  impulse noise
(5 times)
Image Processing, Computer-Assisted
(3 times)
ANFIS (1 time)
AWGN (1 time)
PTA (1 time)
2007 Using uncorrupted neighborhoods of the pixels for impulsive noise suppression with ANFIS.
44  indeterminate
(5 times)
Pediatrics
(1 time)
AS (2 times)
QS (2 times)
APs (1 time)
1979 Respiration during the first six months of life in normal infants: II. The emergence of a circadian pattern.
45  indole
(5 times)
Biophysics
(1 time)
Trp (2 times)
3df,2p (1 time)
AzIN (1 time)
1984 5-Azidoindole binding to the Escherichia coli tryptophan synthase alpha 2 beta 2 complex.
46  infected necrosis
(5 times)
Gastroenterology
(3 times)
AP (4 times)
OF (2 times)
PA (2 times)
1987 Pancreatic abscess and infected pancreatic necrosis. Different local septic complications in acute pancreatitis.
47  infundibuli hypothalami
(5 times)
Veterinary Medicine
(2 times)
IH (5 times)
VIP (5 times)
PRL (3 times)
2008 Vasoactive intestinal peptide and its role in continuous and seasonal reproduction in birds.
48  intermediate
(5 times)
Biochemistry
(3 times)
alpha 1-AT (1 time)
IM (1 time)
NOF (1 time)
1984 An early intermediate in the folding of ribonuclease A is protected against cleavage by pepsin.
49  internal neurolysis
(5 times)
Neurosurgery
(3 times)
MVD (3 times)
TN (3 times)
BNI (2 times)
1983 [Experimental study on the repair of peripheral nerve lesions--subacute compression neuropathy and neurolysis].
50  intussusception
(5 times)
General Surgery
(3 times)
LPS (4 times)
COX (2 times)
i.p (2 times)
2001 Nitric oxide synthase/nitric oxide pathway mediates intussusception pathogenesis in rats.
51  ipsilateral neglect
(5 times)
Neurology
(3 times)
CN (3 times)
CI (1 time)
HSN (1 time)
1998 Ipsilateral neglect: reversal of bias or exaggerated cross-over phenomenon?
52  index
(4 times)
Dentistry
(1 time)
EDTA (1 time)
Er (1 time)
IG (1 time)
2018 Hydrogen sulphide exposure in waste water treatment.
53  India
(4 times)
Cardiology
(2 times)
CN (2 times)
EE (2 times)
KS (2 times)
2017 Antibiotic resistant Pseudomonas spp. in the aquatic environment: A prevalence study under tropical and temperate climate conditions.
54  inhaler
(4 times)
Psychopharmacology
(2 times)
e-cigs (2 times)
MEPs (2 times)
NORM (2 times)
2010 Voluntary breathing influences corticospinal excitability of nonrespiratory finger muscles.
55  inoculated
(4 times)
Veterinary Medicine
(4 times)
CE (3 times)
MAP (3 times)
Ct (1 time)
2003 Fender design and insulation of farrowing huts: effects on performance of outdoor sows and piglets.
56  inorganic fertilizer
(4 times)
Environmental Health
(3 times)
OFC (2 times)
OM (2 times)
BD (1 time)
2013 Transport of Residual Nitrogen and Carbon through Intact Soil Cores Amended with Stockpiled Feedlot Manure with Wood-Chip or Straw Bedding.
57  inosine
(4 times)
Physiology
(1 time)
3MRUN (1 time)
3MTIME (1 time)
AD (1 time)
1987 Inosine preserves ATP during ischemia and enhances recovery during reperfusion.
58  instrument navigation
(4 times)
Gastroenterology
(2 times)
BO (1 time)
CN (1 time)
COS (1 time)
2006 High-level visual-spatial ability for novices correlates with performance in a visual-spatial complex surgical simulator task.
59  insular
(4 times)
Neurology
(2 times)
AAF (2 times)
PAF (2 times)
VPAF (2 times)
2006 Sound localization during homotopic and heterotopic bilateral cooling deactivation of primary and nonprimary auditory cortical areas in the cat.
60  intermediate nerve
(4 times)
Embryology
(1 time)
BP (1 time)
CC (1 time)
HN (1 time)
1989 [The intermediate nerve and its place in the system of cranial nerves].
61  involved-node
(4 times)
Radiotherapy
(4 times)
IF (3 times)
GHSG (2 times)
HL (2 times)
2008 Involved-node radiotherapy in early-stage Hodgkin's lymphoma. Definition and guidelines of the German Hodgkin Study Group (GHSG).
62  HIV-integrase
(3 times)
Virology
(1 time)
cART (1 time)
DTG (1 time)
EVG (1 time)
2005 Synthesis and biological evaluation of geminal disulfones as HIV-1 integrase inhibitors.
63  idiopathic neutropenia
(3 times)
Communicable Diseases
(1 time)
AIN (1 time)
AN (1 time)
HC (1 time)
2008 Idiopathic neutropenia of childhood is associated with Fas/FasL expression.
64  immunization
(3 times)
Vaccines
(1 time)
ASCs (1 time)
BAL (1 time)
IM (1 time)
2007 Evaluation of combinatorial vaccines against anthrax and plague in a murine model.
65  in vitro
(3 times)
Botany
(2 times)
EX (2 times)
AOX (1 time)
Bax (1 time)
2013 Micropropagation effect on the anti-carcinogenic activitiy of polyphenolics from Mexican oregano (Poliomintha glabrescens Gray) in human colon cancer cells HT-29.
66  incandescent
(3 times)
Veterinary Medicine
(3 times)
SV (2 times)
DF (1 time)
DLF (1 time)
1988 Broiler performance when reared under various light sources.
67  indoors
(3 times)
Veterinary Medicine
(3 times)
OUT (2 times)
AB (1 time)
AS (1 time)
2004 Free-range rearing of pigs during the winter: adaptations in muscle fiber characteristics and effects on adipose tissue composition and meat quality traits.
68  industrial noise
(3 times)
Pathology
(1 time)
L/W (2 times)
W/P (2 times)
EDS (1 time)
2013 Histomorphometric evaluation of the coronary artery vessels in rats submitted to industrial noise.
69  infected pancreatic necrosis
(3 times)
Gastroenterology
(3 times)
AP (2 times)
OF (2 times)
AN (1 time)
2014 Hypotension in the first week of acute pancreatitis and APACHE II score predict development of infected pancreatic necrosis.
70  inferior
(3 times)
Physiology
(1 time)
Conn.D (1 time)
DA (1 time)
EX (1 time)
1976 Physiology of peripheral neurons innervating otolith organs of the squirrel monkey. I. Response to static tilts and to long-duration centrifugal force.
71  inflammatory
(3 times)
Dermatology
(2 times)
NIN (3 times)
AEs (2 times)
CI (2 times)
2005 Elevated interleukin-12 and CXCL10 in subacute sclerosing panencephalitis.
72  information needs
(3 times)
Nursing
(1 time)
EN (1 time)
LINQ (1 time)
LN (1 time)
2020 Information need, learning need and educational need, definitions and measurements: A systematic review.
73  Information Nucleus
(3 times)
Veterinary Medicine
(3 times)
IMF (2 times)
EMD (1 time)
FAT (1 time)
2017 Genetic parameters for wool traits, live weight, and ultrasound carcass traits in Merino sheep.
74  infraneural
(3 times)
Anesthesia
(1 time)
CI (1 time)
ESIs (1 time)
HFD (1 time)
2018 Chronic Deafness Degrades Temporal Acuity in the Electrically Stimulated Auditory Pathway.
75  infraspinatus
(3 times)
Meat
(1 time)
PM (2 times)
BF (1 time)
EMG (1 time)
2006 Effects of total iron, myoglobin, hemoglobin, and lipid oxidation of uncooked muscles on livery flavor development and volatiles of cooked beef steaks.
76  injunctive norms
(3 times)
Health Services
(2 times)
DN (3 times)
TNSB (2 times)
DN-DABQ (1 time)
2016 Addressing Inconsistencies in the Social Norms Drinking Literature: Development of the Injunctive Norms Drinking and Abstaining Behaviors Questionnaire.
77  inspiration
(3 times)
Diagnostic Imaging
(2 times)
EX (3 times)
fP (2 times)
FV (2 times)
2020 2D Ultrashort Echo-Time Functional Lung Imaging.
78  integrin
(3 times)
Cell Biology
(3 times)
DCC (2 times)
FAK (2 times)
cyt c (1 time)
2010 Role of hypoxia-induced fibronectin-integrin beta1 expression in embryonic stem cell proliferation and migration: Involvement of PI3K/Akt and FAK.
79  interstitial nucleus
(3 times)
Neurology
(3 times)
ENK (2 times)
GABA (1 time)
HRP (1 time)
1987 Immunocytochemistry of enkephalin and serotonin distribution in restricted zones of the rostral trigeminal spinal subnuclei: comparisons with subnucleus caudalis.
80  intestinal necrosis
(3 times)
General Surgery
(2 times)
OR (2 times)
ASBO (1 time)
CT (1 time)
2012 Circulating intestinal fatty acid-binding protein as an early marker of intestinal necrosis after aortic surgery: a prospective observational cohort study.
81  isonicotinate
(3 times)
Crystallography
(2 times)
1,2-bdc (1 time)
NIPH (1 time)
SBU (1 time)
2009 Poly[diaqua(mu4-benzene-1,2-dicarboxylato)(isonicotinato-kappa2O,O')gadolinium(III)].
82  SLCCNV-IN
(3 times)
Virology
(1 time)
--- 2009 Biological and molecular characterization of a begomovirus associated with yellow mosaic vein mosaic disease of pumpkin from Northern India.
83  alpha-imino nitroxides
(2 times)
Chemistry
(2 times)
NN (2 times)
2001 Towards a better understanding of the magnetic interactions within m-phenylene alpha-nitronyl imino nitroxide based biradicals.
84  anti-integrase
(2 times)
Molecular Biology
(2 times)
Abzs (1 time)
AGD (1 time)
OPs (1 time)
2013 Specific anti-integrase abzymes from HIV-infected patients: a comparison of the cleavage sites of intact globular HIV integrase and two 20-mer oligopeptides corresponding to its antigenic determinants.
85  ice nucleators
(2 times)
Science
(2 times)
TOC (1 time)
2008 Ubiquity of biological ice nucleators in snowfall.
86  imino-nitroxyl
(2 times)
Chemistry
(2 times)
OV (2 times)
PMMDs (2 times)
SC (2 times)
2007 Intramolecular spin alignment in photomagnetic molecular devices: a theoretical study.
87  iminonitroxide
(2 times)
Chemistry, Physical
(2 times)
DFT (2 times)
TTF (2 times)
HOMA (1 time)
2013 Theoretical investigation of stilbene as photochromic spin coupler.
88  immune-mediated neuropathies
(2 times)
Chemistry, Clinical
(1 time)
CIDP (2 times)
aGAAb (1 time)
aSF (1 time)
2009 Improving fatigue assessment in immune-mediated neuropathies: the modified Rasch-built fatigue severity scale.
89  inactive
(2 times)
Obesity
(1 time)
AC (1 time)
AD (1 time)
HA (1 time)
2008 Active application improves the bonding performance of self-etch adhesives to dentin.
90  inactive nephritis
(2 times)
Rheumatology
(2 times)
AN (2 times)
ER (1 time)
HC (1 time)
2017 Role of endoplasmic reticulum stress in the protective effects of PPARbeta/delta activation on endothelial dysfunction induced by plasma from patientswith lupus.
91  inadequate
(2 times)
Science
(2 times)
AD (1 time)
IL-10 (1 time)
IL-6 (1 time)
2006 In vitro TNF-alpha and IL-6 production by adherent peripheral blood mononuclear cells obtained from type 1 and type 2 diabetic patients evaluated according to the metabolic control.
92  included
(2 times)
Communicable Diseases, Emerging
(1 time)
DIVA (1 time)
PRECIS (1 time)
RCT (1 time)
2014 Diagnostic-test evaluation of immunoassays for anti-Toxoplasma gondii IgG antibodies in a random sample of Mexican population.
93  indanoyl-isoleucine
(2 times)
Metabolomics
(1 time)
MCoA (2 times)
IS (1 time)
LG (1 time)
2012 Investigation of Phenolic Acids in Suspension Cultures of Vitis vinifera Stimulated with Indanoyl-Isoleucine, N-Linolenoyl-L-Glutamine, Malonyl Coenzyme A and Insect Saliva.
94  index-node
(2 times)
Neoplasms
(1 time)
DFS (2 times)
LRFS (2 times)
MTV (2 times)
2015 Prognostic role of metabolic parameters of (18)F-FDG PET-CT scan performed during radiation therapy in locally advanced head and neck squamous cell carcinoma.
95  indicators
(2 times)
Veterinary Medicine
(1 time)
BMI (1 time)
CI (1 time)
GFR (1 time)
2018 Abdominal obesity and reduction of glomerular filtration.
96  inducing
(2 times)
Botany
(1 time)
CO (1 time)
2008 Induction of Systemic Resistance to Albugo candida in Brassica juncea by Pre- or Coinoculation with an Incompatible Isolate.
97  inertial nulling
(2 times)
Science
(2 times)
PSE (2 times)
CE (1 time)
VFM (1 time)
2015 Human Vection Perception Using Inertial Nulling and Certainty Estimation: The Effect of Migraine History.
98  Infasurf
(2 times)
Pediatrics
(1 time)
SU (2 times)
EX (1 time)
min (1 time)
1992 Surface tension of therapeutic surfactants (exosurf neonatal, infasurf, and survanta) as evaluated by standard methods and criteria.
99  Infectivity-neutralizing
(2 times)
Clinical Laboratory Techniques
(2 times)
HAI (2 times)
RBCV (2 times)
EBCV (1 time)
2001 Infectivity-neutralizing and hemagglutinin-inhibiting antibody responses to respiratory coronavirus infections of cattle in pathogenesis of shipping fever pneumonia.
100  inflammation
(2 times)
Dentistry
(1 time)
CT (1 time)
HYP (1 time)
InGaAsP (1 time)
2005 Cytological screening and 15 years' follow-up (1986-2001) for early esophageal squamous cell carcinoma and precancerous lesions in a high-risk population in Anyang County, Henan Province, Northern China.