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Abbreviation: PI
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Long Form No. Long Form Research Area Co-occurring Abbreviation PubMed/MEDLINE Info. (Year, Title)
propidium iodide
(3418 times)
Neoplasms
(379 times)
ROS (279 times)
FITC (196 times)
LDH (119 times)
1976 Rapid staining methods for analysis of deoxyribonucleic acid and protein in mammalian cells.
phosphatidylinositol
(3229 times)
Biochemistry
(1103 times)
PC (677 times)
PE (510 times)
PS (417 times)
1966 Fatty acids in phospholipids isolated from human red cells.
pulsatility index
(2783 times)
Obstetrics
(776 times)
RI (939 times)
MCA (346 times)
PSV (246 times)
1980 The relationship between ultrasonic pulsatility index and proximal arterial stenosis in a canine model.
protease inhibitor
(2388 times)
Acquired Immunodeficiency Syndrome
(673 times)
NNRTI (424 times)
ART (300 times)
HAART (285 times)
1970 Protease inhibitor (Pi) phenotypes in chromosome aberrations.
plaque index
(1336 times)
Dentistry
(914 times)
GI (740 times)
PD (544 times)
CAL (420 times)
1985 The application of a collagen stabilizer to the gingiva of the beagle dog. Effect on ligature-induced periodontal disease.
phosphoinositide
(940 times)
Biochemistry
(198 times)
PKC (64 times)
PLC (61 times)
IP (32 times)
1975 [Inositol-containing phospholipids in rat brain and liver].
proliferation index
(731 times)
Neoplasms
(159 times)
AI (126 times)
PCNA (73 times)
FCM (55 times)
1975 [The effect of diphtheria toxin on proliferation of a transplantable culture of human amnion cells].
pelvic incidence
(573 times)
Orthopedics
(291 times)
LL (363 times)
PT (341 times)
SS (269 times)
2002 Relation between the pelvis and the sagittal profile in adolescent idiopathic scoliosis: the influence of curve type.
polyimide
(403 times)
Biomedical Engineering
(100 times)
PAA (27 times)
XPS (20 times)
SEM (16 times)
1999 Material-independent determination of anchoring properties on rubbed polyimide surfaces.
10  perfusion index
(222 times)
Anesthesiology
(35 times)
PVI (20 times)
MAP (17 times)
HR (16 times)
0 Masimo Perfusion Index Versus Doppler for Tourniquet Effectiveness Monitoring.
11  prognostic index
(199 times)
Neoplasms
(85 times)
NLR (34 times)
OS (34 times)
PNI (29 times)
1982 A modified prognostic index based upon nutritional measurements.
12  Pneumatosis intestinalis
(169 times)
General Surgery
(27 times)
CT (26 times)
PVG (15 times)
HPVG (9 times)
1983 Pneumatosis intestinalis in childhood leukaemia. Report of a case with gas in the portal vein and review of the literature.
13  ponderal index
(166 times)
Pediatrics
(38 times)
BMI (43 times)
BW (21 times)
SGA (17 times)
1978 Fetal malnutrition: an experimental study of its consequences on infant development in two caregiving environments.
14  proportional-integral
(145 times)
Biomedical Engineering
(69 times)
PD (7 times)
SMC (6 times)
PID (5 times)
1988 Expert-system-based fuzzy control of arterial pressure by drug infusion.
15  protective index
(138 times)
Chemistry
(19 times)
MES (32 times)
scPTZ (12 times)
i.p (6 times)
1979 Eye movements simultaneously recorded by electrooculographic and photoelectric methods.
16  prediction interval
(136 times)
Medicine
(17 times)
CI (26 times)
RT (8 times)
OR (7 times)
1975 Relationship of reaction time to deceleration and variability of heart rate in nonretarded and retarded persons.
17  peak intensity
(133 times)
Medicine
(28 times)
CEUS (69 times)
AUC (66 times)
TTP (61 times)
2002 Assessment of coronary stenoses of graded severity by myocardial contrast echocardiography.
18  proactive interference
(126 times)
Psychology
(72 times)
WM (16 times)
RI (5 times)
CVLT (4 times)
1971 The effects of practice trials and prior learning on motor memory.
19  pars intermedia
(116 times)
Endocrinology
(50 times)
PD (31 times)
PPD (26 times)
RPD (23 times)
1975 The effect of apomorphine and ergocriptine on the release of MSH by the pars intermedia of Rana pipiens.
20  pain intensity
(108 times)
Neurology
(21 times)
PR (13 times)
AEs (11 times)
VAS (10 times)
1979 Comparison of the analgesic dose-effect relationships of nefopam and oxycodone in postoperative pain.
21  pulse interval
(108 times)
Physiology
(37 times)
HR (24 times)
BRS (23 times)
LF (20 times)
1975 Reduced baroreflex sensitivity with volume loading in conscious dogs.
22  pancreatic insufficiency
(107 times)
Pediatrics
(43 times)
CF (85 times)
PS (33 times)
CFTR (10 times)
1976 Quantitative evaluation of serum pancreatic isoamylases in cystic fibrosis.
23  primary insomnia
(100 times)
Psychophysiology
(38 times)
PSQI (13 times)
PSG (10 times)
GS (8 times)
2001 Primary versus secondary insomnia in older adults: subjective sleep and daytime functioning.
24  principal investigator
(99 times)
Medicine
(11 times)
NIH (10 times)
EM (5 times)
IRB (4 times)
1985 National Institutes of Health phase I, Small Business Innovation Research applications: fiscal year 1983 results.
25  phagocytic index
(97 times)
Allergy and Immunology
(31 times)
PA (17 times)
SOD (9 times)
NBT (8 times)
1976 The effect of cytotoxic drugs on neutrophil phagocytosis in vitro and in patients with acute myelogenous leukaemia.
26  polydispersity index
(94 times)
Pharmacology
(35 times)
ZP (21 times)
EE (19 times)
DSC (12 times)
2001 A new nerve guide conduit material composed of a biodegradable poly(phosphoester).
27  pain interference
(93 times)
Orthopedics
(43 times)
PROMIS (73 times)
PF (65 times)
UE (19 times)
2013 Measurement invariance of the PROMIS pain interference item bank across community and clinical samples.
28  PISTILLATA
(92 times)
Botany
(43 times)
AP3 (60 times)
AG (16 times)
AP1 (11 times)
1991 The FLO10 Gene Product Regulates the Expression Domain of Homeotic Genes AP3 and PI in Arabidopsis Flowers.
29  plant introduction
(91 times)
Genetics
(24 times)
SCN (9 times)
QTL (6 times)
MAS (4 times)
1984 Abscisic Acid and its relationship to seed filling in soybeans.
30  proinsulin
(82 times)
Endocrinology
(42 times)
IRI (23 times)
TI (10 times)
IGT (9 times)
1981 Effects of liver and kidney on high molecular weight immunoreactive insulin (HWIRI), proinsulin (PI) and insulin (I) in man.
31  performance improvement
(80 times)
Health Services
(21 times)
CME (9 times)
ED (3 times)
ISS (3 times)
1994 The Agenda for Change: performance focus alters JCAHO's survey process.
32  pressure injury
(75 times)
Nursing
(38 times)
SCI (7 times)
AUC (4 times)
CI (4 times)
2014 The role of patients in pressure injury prevention: a survey of acute care patients.
33  pulsatility
(75 times)
Diagnostic Imaging
(17 times)
RI (73 times)
MCA (7 times)
TCD (6 times)
1990 Uterine and fetal umbilical artery flow velocity waveforms in normal first trimester pregnancies.
34  parallel imaging
(70 times)
Diagnostic Imaging
(47 times)
SNR (17 times)
CS (16 times)
MRI (9 times)
2004 Current concepts and advances in clinical parallel magnetic resonance imaging.
35  performance index
(68 times)
Veterinary Medicine
(12 times)
RCs (5 times)
OEC (3 times)
PSII (3 times)
1980 Classification of abnormal children: discrimination learning ability.
36  pathogen inactivation
(57 times)
Hematology
(49 times)
PCs (16 times)
PLT (10 times)
RBC (6 times)
2001 Reducing the risk of blood transfusion.
37  peri-implantitis
(54 times)
Dentistry
(35 times)
CP (10 times)
HI (6 times)
p-iM (6 times)
2000 Aspartate aminotransferase activity in crevicular fluid from dental implants.
38  photoionization
(54 times)
Chemistry Techniques, Analytical
(13 times)
EAE (9 times)
MS (8 times)
EI (7 times)
1984 Interaction of high temperature and Salmonella pullorum antigen concentration on serum agglutinin and corticosteroid responses in white rock chickens.
39  peripheral iridotomy
(52 times)
Ophthalmology
(36 times)
IOP (21 times)
ICL (5 times)
PACG (4 times)
1977 Peripheral iridectomy in closed angle glaucoma-- late complications.
40  pulmonary insufficiency
(51 times)
Cardiology
(27 times)
TOF (23 times)
RV (16 times)
CMR (6 times)
1977 [Validity of thermodilution cardiac output determination in the presence of pulmonary insufficiency (author's transl)].
41  polyisoprene
(48 times)
Chemistry
(16 times)
PS (17 times)
DSC (3 times)
PDMS (3 times)
1994 Preparation and properties of A-B-A type block copolymer membranes consisting of poly(N-hydroxypropyl-L-glutamine) as the A component and polyisoprene as the B component.
42  Pacific Islander
(47 times)
Public Health
(10 times)
AA (5 times)
BMI (5 times)
NH (5 times)
1981 Hospital admissions for asthma in children: a prospective study.
43  pars intercerebralis
(44 times)
Neurology
(11 times)
PL (10 times)
CA (7 times)
PDF (5 times)
1978 Locations and central projections of neurons associated with the retrocerebral neuroendocrine complex of the cockroach Periplaneta americana (L.).
44  postirradiation
(39 times)
Neoplasms
(8 times)
Gy (2 times)
IL (2 times)
ABC (1 time)
1977 Mucormycotic hepatic lesions resembling bacillary hemoglobinuria infarcts in irradiated calves.
45  progression index
(38 times)
Neurology
(17 times)
MS (26 times)
EDSS (16 times)
MSSS (9 times)
1986 Progression index and disability status in multiple sclerosis: a resurvey of 207 patients in central Poland.
46  paternity index
(37 times)
Jurisprudence
(23 times)
PE (6 times)
PM (6 times)
PD (5 times)
1980 Numerical expression of paternity test results using predetermined indexes.
47  Periodontal Index
(37 times)
Dentistry
(25 times)
GI (6 times)
CPITN (3 times)
PPD (3 times)
1974 Periodontal disease among youths 12-17 years, United States.
48  permeability index
(37 times)
General Surgery
(7 times)
SAR (6 times)
KR (4 times)
WQI (4 times)
1984 Increased airway mucosal permeability of smokers. Relationship to airway reactivity.
49  post-injury
(36 times)
Neurology
(17 times)
SCI (9 times)
TBI (3 times)
ANOVA (2 times)
1977 [Ultrastructure of the cells and DNA synthesis in skeletal muscle regeneration. A study of the regeneration of the frog sartorius muscle by an electron microscopic autoradiographic method].
50  posterior interval
(36 times)
Environmental Health
(21 times)
CAPES (3 times)
EC (3 times)
OCM (3 times)
2004 Ozone and short-term mortality in 95 US urban communities, 1987-2000.
51  pulse inversion
(36 times)
Nuclear Medicine
(7 times)
CTR (10 times)
US (6 times)
AM (4 times)
1995 Phase-inversion cellulose acetate membranes for suppression of protein interferences in anodic stripping voltammetry.
52  pyrrole-imidazole
(35 times)
Chemistry
(7 times)
TGF (5 times)
AP-1 (3 times)
TGF-beta1 (3 times)
2008 Novel gene silencer pyrrole-imidazole polyamide targeting lectin-like oxidized low-density lipoprotein receptor-1 attenuates restenosis of the artery after injury.
53  plasma insulin
(33 times)
Endocrinology
(8 times)
BG (7 times)
PE (7 times)
PG (7 times)
1979 Treatment of mucopolysaccharidosis: clinical and biochemical aspects of leucocyte transfusion as compared with plasma infusion in patients with Hurler's and Scheie's syndromes.
54  probability interval
(30 times)
Veterinary Medicine
(15 times)
ELISA (3 times)
OR (3 times)
BDD (2 times)
2000 Decision analysis of tamoxifen for the prevention of invasive breast cancer.
55  physical inactivity
(29 times)
Public Health
(9 times)
PA (7 times)
BMI (4 times)
CI (2 times)
2004 Joint impact of health risks on health care charges: 7-year follow-up of National Health Insurance beneficiaries in Japan (the Ohsaki Study).
56  penetration index
(28 times)
Pulmonary Medicine
(11 times)
SPECT (4 times)
DTPA (2 times)
MMAD (2 times)
1986 Radioaerosol assessment of mucociliary clearance: towards definition of a normal range.
57  perfusion imaging
(28 times)
Neurology
(15 times)
DWI (22 times)
MCA (4 times)
MRA (4 times)
1998 A novel endothelin antagonist, A-127722, attenuates ischemic lesion size in rats with temporary middle cerebral artery occlusion: a diffusion and perfusion MRI study.
58  posterior insula
(28 times)
Brain
(8 times)
AI (14 times)
dAI (6 times)
FC (5 times)
2014 You are the danger: attenuated insula response in methamphetamine users during aversive interoceptive decision-making.
59  pulmonary infection
(28 times)
Pulmonary Medicine
(6 times)
PE (4 times)
AFL (3 times)
MI (3 times)
1988 [Assessment of interaction between the left and right ventricles using pressure-volume loops in various heart diseases].
60  pattern identification
(27 times)
Complementary Therapies
(16 times)
TKM (6 times)
CM (3 times)
DP (3 times)
1998 Impaired word-stem completion priming but intact perceptual identification priming with novel words: evidence from the amnesic patient H.M.
61  Pietrain
(27 times)
Veterinary Medicine
(12 times)
DU (6 times)
DUPI (3 times)
LR (3 times)
2002 Variation in clinical and parasitological traits in Pietrain and Meishan pigs infected with Sarcocystis miescheriana.
62  plasmin inhibition
(27 times)
Vascular Diseases
(13 times)
PAI (17 times)
PAA (16 times)
tPA (8 times)
1988 Great variation in the response of tissue plasminogen activator activity, plasminogen activator inhibition and plasmin inhibition to endotoxin, aspirin and endotoxin after administration of aspirin.
63  Padua Inventory
(25 times)
Therapeutics
(11 times)
OCD (12 times)
BDI (4 times)
MOCI (4 times)
1992 Obsessions and compulsions: dimensional structure, reliability, convergent and divergent validity of the Padua Inventory.
64  pancreatic islets
(25 times)
Transplantation
(7 times)
GK (3 times)
MRI (3 times)
BN (2 times)
1998 [Odontogenic focus as the etiology of cerebral ischemia].
65  peak-interval
(25 times)
Behavioral Sciences
(11 times)
FI (5 times)
DA (4 times)
MAP (2 times)
1996 Cyclic responding by pigeons on the peak timing procedure.
66  proximal intestine
(25 times)
Allergy and Immunology
(19 times)
DI (20 times)
MI (17 times)
TOR (9 times)
1993 Tissue distribution of microsomal cytochrome P-450 monooxygenases and their inducibility by phenobarbital in the insecticide resistant LPR strain of house fly, Musca domestica L.
67  pallidal index
(23 times)
Toxicology
(14 times)
Mn (13 times)
MRI (13 times)
GP (5 times)
1996 Increased blood manganese in cirrhotic patients: relationship to pallidal magnetic resonance signal hyperintensity and neurological symptoms.
68  primary immunodeficiency
(23 times)
Allergy and Immunology
(15 times)
JMCN (6 times)
IVIG (4 times)
SCIG (4 times)
1999 [Computerized tomography of the lungs in patients with congenital immunodeficiency. Comparison with clinicoradiologic assessment].
69  Pearl Index
(22 times)
Reproductive Medicine
(14 times)
CI (5 times)
COC (4 times)
EE (4 times)
1993 Prospective European multi-center study of natural family planning (1989-1992): interim results. The European Natural Family Planning Study Groups.
70  performance-intensity
(22 times)
Audiology
(16 times)
MSTMs (2 times)
PSI (2 times)
SNRs (2 times)
1977 Use of performance-intensity functions for diagnosis.
71  phospholipid
(22 times)
Pharmacology
(5 times)
KA (2 times)
NA (2 times)
NMDA (2 times)
1986 Stimulation by noradrenaline of inositol phospholipid breakdown in the rat hippocampus: effect of the ambient potassium concentration.
72  proliferation
(22 times)
Neoplasms
(8 times)
AI (14 times)
MI (4 times)
5-FU (1 time)
1996 Mitotic index and lymphocyte proliferation kinetics in testing the genotoxicity of chemical agents.
73  prostate index
(22 times)
Pharmacology
(7 times)
BPH (15 times)
COX-2 (5 times)
DHT (5 times)
2008 Antidiarrhoeal activity of the ethyl acetate extract of Baphia nitida (Papilionaceae).
74  protein intake
(22 times)
Nutritional Sciences
(8 times)
EI (4 times)
BMI (3 times)
ALB (2 times)
1987 Adequacy studies of fistula single-needle dialysis.
75  path integration
(21 times)
Biology
(7 times)
AD (2 times)
VE (2 times)
aMCI (1 time)
1999 Calibration of vector navigation in desert ants.
76  periductal infiltrating
(21 times)
General Surgery
(13 times)
MF (20 times)
ICC (18 times)
IG (12 times)
2001 Predictive factors for long-term survival in patients with intrahepatic cholangiocarcinoma.
77  placental insufficiency
(21 times)
Obstetrics
(6 times)
IUGR (8 times)
PE (2 times)
2SD (1 time)
1994 [The mechanisms of the development of pregnancy complications in hypertension and glomerulonephritis].
78  post-institutionalized
(21 times)
Psychology
(13 times)
NA (7 times)
ADHD (2 times)
DSE (2 times)
2009 Postinstitutionalized children's development: growth, cognitive, and language outcomes.
79  postimplantation
(21 times)
Parasitology
(4 times)
SEM (3 times)
APO (2 times)
LPS (2 times)
1983 Terminal airway embryology of the delphinid porpoises, Stenella attenuata and S. longirostris.
80  pulvinar
(21 times)
Neurology
(15 times)
PL (9 times)
PM (5 times)
SC (5 times)
1976 The cortical projections of the inferior pulvinar and adjacent lateral pulvinar in the rhesus monkey (Macaca mulatta): an autoradiographic study.
81  protein I
(20 times)
Communicable Diseases
(8 times)
LPS (3 times)
NHS (2 times)
CMP-NANA (1 time)
1982 125I-peptide mapping of protein III isolated from four strains of Neisseria gonorrhoeae.
82  photoinitiator
(19 times)
Biomedical Engineering
(4 times)
CP (2 times)
DC (2 times)
EY (2 times)
2006 Stereolithography of three-dimensional bioactive poly(ethylene glycol) constructs with encapsulated cells.
83  prescribing information
(19 times)
Pharmacy
(3 times)
AEs (4 times)
AE (2 times)
CKD (2 times)
2003 Patient-reported utilization patterns of fentanyl transdermal system and oxycodone hydrochloride controlled-release among patients with chronic nonmalignant pain.
84  psychodynamic-interpersonal
(19 times)
Psychology
(14 times)
CB (12 times)
CPPS (4 times)
ICC (2 times)
1995 Effects of treatment duration and severity of depression on the maintenance of gains after cognitive-behavioral and psychodynamic-interpersonal psychotherapy.
85  postischemia
(18 times)
Brain
(6 times)
GBI (3 times)
ERG (2 times)
ND (2 times)
1975 Global ischemia in dogs: cerebrovascular CO2 reactivity and autoregulation.
86  postural instability
(18 times)
Neurology
(9 times)
PD (12 times)
BBS (3 times)
UPDRS (3 times)
2002 Postural instability in idiopathic Parkinson's disease: the role of medication and unilateral pallidotomy.
87  product information
(18 times)
Drug Therapy
(6 times)
MIMS (4 times)
ADRs (2 times)
AEs (2 times)
2003 Dosing information for paediatric patients: are they really "therapeutic orphans"?
88  parametrial involvement
(17 times)
Neoplasms
(10 times)
LVSI (6 times)
DSI (4 times)
CI (3 times)
2002 How important is removal of the parametrium at surgery for carcinoma of the cervix?
89  patient involvement
(17 times)
Health Services Research
(4 times)
HTA (4 times)
ATL (1 time)
BLT (1 time)
2000 Parent Involvement in School Conceptualizing Multiple Dimensions and Their Relations with Family and Demographic Risk Factors.
90  policy iteration
(17 times)
Neural Networks (Computer)
(8 times)
ADP (3 times)
HJB (2 times)
NN (2 times)
2013 A policy iteration approach to online optimal control of continuous-time constrained-input systems.
91  peroxidizability index
(16 times)
Biochemistry
(3 times)
PUFA (4 times)
P/S (2 times)
TBARS (2 times)
1979 Effect of dietary fat and vitamin E on mouse lung lipids.
92  phototoxic index
(16 times)
Chemistry
(8 times)
PDT (6 times)
MED (3 times)
aPDT (2 times)
1975 Tar photoxicity and phototherapy for psoriasis.
93  postinfusion
(16 times)
Veterinary Medicine
(8 times)
DFO (2 times)
LPS (2 times)
201Tl (1 time)
1980 Thermal injury of Yersinia enterocolitica.
94  Prandtl-Ishlinskii
(16 times)
Cybernetics
(3 times)
DIAPI (1 time)
FLSs (1 time)
I-M (1 time)
2009 Development of a piezo-actuated micro-teleoperation system for cell manipulation.
95  primary isolates
(16 times)
Virology
(12 times)
HIV-1 (6 times)
TCLA (6 times)
PBMC (3 times)
1996 Quantitative model of antibody- and soluble CD4-mediated neutralization of primary isolates and T-cell line-adapted strains of human immunodeficiency virus type 1.
96  pristinamycin I
(16 times)
Molecular Biology
(4 times)
PII (7 times)
ptr (3 times)
EMSAs (2 times)
1993 [Evaluation of in vitro activity of pristinamycin against Haemophilus influenzae].
97  AnnexinV-propidium iodide
(15 times)
Allergy and Immunology
(3 times)
ROS (2 times)
AO (1 time)
ASODN (1 time)
2003 Sensitivity to methylmercury-induced autoimmune disease in mice correlates with resistance to apoptosis of activated CD4+ lymphocytes.
98  package insert
(15 times)
Pharmacology
(4 times)
FDA (3 times)
ACIP (1 time)
ADEs (1 time)
1991 Attitude of the public toward technical package inserts for medication information in Belgium.
99  primary infection
(15 times)
Acquired Immunodeficiency Syndrome
(4 times)
si (3 times)
CI (2 times)
ACV (1 time)
1997 Course of specific T lymphocyte cytotoxicity, plasma and cellular viral loads, and neutralizing antibody titers in 17 recently seroconverted HIV type 1-infected patients.
100  psychophysiological insomnia
(15 times)
Psychophysiology
(8 times)
CBT-I (4 times)
GS (3 times)
NS (3 times)
1995 [Polysomnographic structure of subjective "awake" and "asleep" nocturnal segments].