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Abbreviation: PI
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Long forms: 1614

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Long Form No. Long Form Research Area Co-occurring Abbreviation PubMed/MEDLINE Info. (Year, Title)
propidium iodide
(3603 times)
Neoplasms
(403 times)
ROS (303 times)
FITC (206 times)
LDH (132 times)
1976 Rapid staining methods for analysis of deoxyribonucleic acid and protein in mammalian cells.
phosphatidylinositol
(3294 times)
Biochemistry
(1108 times)
PC (704 times)
PE (535 times)
PS (438 times)
1966 Fatty acids in phospholipids isolated from human red cells.
pulsatility index
(2929 times)
Obstetrics
(810 times)
RI (991 times)
MCA (370 times)
PSV (270 times)
1980 The relationship between ultrasonic pulsatility index and proximal arterial stenosis in a canine model.
protease inhibitor
(2472 times)
Acquired Immunodeficiency Syndrome
(684 times)
NNRTI (432 times)
ART (323 times)
HAART (286 times)
1970 Protease inhibitor (Pi) phenotypes in chromosome aberrations.
plaque index
(1484 times)
Dentistry
(995 times)
GI (825 times)
PD (605 times)
BOP (471 times)
1985 The application of a collagen stabilizer to the gingiva of the beagle dog. Effect on ligature-induced periodontal disease.
phosphoinositide
(946 times)
Biochemistry
(196 times)
PKC (64 times)
PLC (61 times)
IP (32 times)
1975 [Inositol-containing phospholipids in rat brain and liver].
proliferation index
(747 times)
Neoplasms
(167 times)
AI (129 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
(657 times)
Orthopedics
(328 times)
LL (419 times)
PT (384 times)
SS (306 times)
2004 Spondylolisthesis, pelvic incidence, and spinopelvic balance: a correlation study.
polyimide
(489 times)
Biomedical Engineering
(119 times)
PAA (31 times)
XPS (21 times)
PDMS (17 times)
2000 Adhesion and patterning of cortical neurons on polyethylenimine- and fluorocarbon-coated surfaces.
10  perfusion index
(243 times)
Anesthesiology
(36 times)
PVI (20 times)
HR (17 times)
MAP (17 times)
1986 Cortex perfusion index: a sensitive detector of acute rejection crisis in transplanted kidneys.
11  prognostic index
(226 times)
Neoplasms
(93 times)
OS (44 times)
NLR (40 times)
PNI (35 times)
1982 A modified prognostic index based upon nutritional measurements.
12  Pneumatosis intestinalis
(184 times)
General Surgery
(29 times)
CT (26 times)
PVG (16 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
(174 times)
Pediatrics
(39 times)
BMI (47 times)
BW (24 times)
SGA (17 times)
1978 Fetal malnutrition: an experimental study of its consequences on infant development in two caregiving environments.
14  prediction interval
(162 times)
Medicine
(18 times)
CI (34 times)
OR (9 times)
RCTs (8 times)
1975 Relationship of reaction time to deceleration and variability of heart rate in nonretarded and retarded persons.
15  proportional-integral
(161 times)
Biomedical Engineering
(76 times)
PD (7 times)
MPC (6 times)
SMC (6 times)
1988 Expert-system-based fuzzy control of arterial pressure by drug infusion.
16  peak intensity
(149 times)
Medicine
(30 times)
CEUS (80 times)
AUC (75 times)
TTP (68 times)
2002 Assessment of coronary stenoses of graded severity by myocardial contrast echocardiography.
17  protective index
(144 times)
Chemistry
(20 times)
MES (32 times)
scPTZ (13 times)
i.p (6 times)
1979 Eye movements simultaneously recorded by electrooculographic and photoelectric methods.
18  proactive interference
(131 times)
Psychology
(74 times)
WM (17 times)
RI (6 times)
CVLT (4 times)
1971 The effects of practice trials and prior learning on motor memory.
19  Pain Interference
(120 times)
Orthopedics
(52 times)
PROMIS (97 times)
PF (87 times)
UE (26 times)
2009 The relationship between subjective reports of fatigue and executive control in multiple sclerosis.
20  pancreatic insufficiency
(116 times)
Pediatrics
(44 times)
CF (90 times)
PS (36 times)
CFTR (12 times)
1976 Quantitative evaluation of serum pancreatic isoamylases in cystic fibrosis.
21  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.
22  pressure injury
(114 times)
Nursing
(59 times)
SCI (7 times)
AUC (6 times)
CI (6 times)
2014 The role of patients in pressure injury prevention: a survey of acute care patients.
23  pain intensity
(113 times)
Neurology
(21 times)
PR (13 times)
VAS (12 times)
AEs (11 times)
1979 Comparison of the analgesic dose-effect relationships of nefopam and oxycodone in postoperative pain.
24  principal investigator
(112 times)
Medicine
(13 times)
NIH (10 times)
EM (5 times)
IQR (4 times)
1985 National Institutes of Health phase I, Small Business Innovation Research applications: fiscal year 1983 results.
25  pulse interval
(111 times)
Physiology
(37 times)
HR (26 times)
BRS (23 times)
LF (20 times)
1975 Reduced baroreflex sensitivity with volume loading in conscious dogs.
26  primary insomnia
(107 times)
Psychophysiology
(40 times)
PSQI (16 times)
PSG (11 times)
GS (8 times)
2001 Primary versus secondary insomnia in older adults: subjective sleep and daytime functioning.
27  phagocytic index
(99 times)
Allergy and Immunology
(33 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.
28  polydispersity index
(99 times)
Pharmacology
(37 times)
ZP (21 times)
EE (19 times)
DSC (12 times)
2001 A new nerve guide conduit material composed of a biodegradable poly(phosphoester).
29  PISTILLATA
(95 times)
Botany
(43 times)
AP3 (62 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.
30  plant introduction
(95 times)
Genetics
(24 times)
SCN (10 times)
QTL (6 times)
MAS (4 times)
1984 Abscisic Acid and its relationship to seed filling in soybeans.
31  proinsulin
(87 times)
Endocrinology
(42 times)
IRI (23 times)
TI (11 times)
IGT (9 times)
1981 Effects of liver and kidney on high molecular weight immunoreactive insulin (HWIRI), proinsulin (PI) and insulin (I) in man.
32  performance improvement
(82 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.
33  parallel imaging
(79 times)
Diagnostic Imaging
(48 times)
CS (20 times)
SNR (18 times)
MRI (11 times)
2004 Current concepts and advances in clinical parallel magnetic resonance imaging.
34  pulsatility
(78 times)
Diagnostic Imaging
(18 times)
RI (75 times)
MCA (7 times)
PSV (6 times)
1990 Uterine and fetal umbilical artery flow velocity waveforms in normal first trimester pregnancies.
35  performance index
(72 times)
Veterinary Medicine
(13 times)
RCs (5 times)
OEC (3 times)
PSII (3 times)
1980 Classification of abnormal children: discrimination learning ability.
36  peri-implantitis
(67 times)
Dentistry
(46 times)
CP (11 times)
PM (8 times)
HI (6 times)
2000 Aspartate aminotransferase activity in crevicular fluid from dental implants.
37  pathogen inactivation
(61 times)
Hematology
(53 times)
PCs (16 times)
PLT (11 times)
PC (6 times)
2001 Reducing the risk of blood transfusion.
38  photoionization
(59 times)
Chemistry Techniques, Analytical
(15 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  pulmonary insufficiency
(55 times)
Cardiology
(30 times)
TOF (24 times)
RV (18 times)
CMR (7 times)
1977 [Validity of thermodilution cardiac output determination in the presence of pulmonary insufficiency (author's transl)].
40  pars intercerebralis
(53 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.).
41  peripheral iridotomy
(53 times)
Ophthalmology
(37 times)
IOP (21 times)
ICL (5 times)
PAC (4 times)
1977 Peripheral iridectomy in closed angle glaucoma-- late complications.
42  Pacific Islander
(52 times)
Public Health
(10 times)
BMI (6 times)
AA (5 times)
NH (5 times)
1981 Hospital admissions for asthma in children: a prospective study.
43  polyisoprene
(52 times)
Chemistry
(16 times)
PS (18 times)
DSC (3 times)
PB (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.
44  permeability index
(48 times)
Environmental Health
(15 times)
SAR (17 times)
KR (12 times)
RSC (10 times)
1984 Increased airway mucosal permeability of smokers. Relationship to airway reactivity.
45  progression index
(43 times)
Neurology
(19 times)
MS (27 times)
EDSS (17 times)
MSSS (9 times)
1986 Progression index and disability status in multiple sclerosis: a resurvey of 207 patients in central Poland.
46  postirradiation
(42 times)
Neoplasms
(9 times)
Gy (2 times)
IL (2 times)
SD (2 times)
1977 Mucormycotic hepatic lesions resembling bacillary hemoglobinuria infarcts in irradiated calves.
47  Periodontal Index
(40 times)
Dentistry
(25 times)
GI (7 times)
BOP (3 times)
CPITN (3 times)
1974 Periodontal disease among youths 12-17 years, United States.
48  paternity index
(39 times)
Jurisprudence
(24 times)
PE (7 times)
PM (6 times)
PD (5 times)
1980 Numerical expression of paternity test results using predetermined indexes.
49  pulse inversion
(39 times)
Nuclear Medicine
(10 times)
CTR (11 times)
US (7 times)
AM (6 times)
1995 Phase-inversion cellulose acetate membranes for suppression of protein interferences in anodic stripping voltammetry.
50  pyrrole-imidazole
(38 times)
Chemistry
(8 times)
TGF (6 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.
51  posterior interval
(37 times)
Environmental Health
(22 times)
OR (4 times)
CAPES (3 times)
EC (3 times)
2004 Ozone and short-term mortality in 95 US urban communities, 1987-2000.
52  post-injury
(36 times)
Neurology
(17 times)
SCI (9 times)
TBI (3 times)
GFAP (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].
53  posterior insula
(34 times)
Brain
(8 times)
AI (15 times)
dAI (7 times)
FC (6 times)
2014 You are the danger: attenuated insula response in methamphetamine users during aversive interoceptive decision-making.
54  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.
55  physical inactivity
(32 times)
Public Health
(11 times)
PA (8 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  probability interval
(32 times)
Veterinary Medicine
(16 times)
ELISA (3 times)
OR (3 times)
BDD (2 times)
2000 Decision analysis of tamoxifen for the prevention of invasive breast cancer.
57  pulmonary infarction
(31 times)
Pulmonary Medicine
(8 times)
PE (5 times)
AFL (3 times)
CT (3 times)
1988 [Assessment of interaction between the left and right ventricles using pressure-volume loops in various heart diseases].
58  penetration index
(29 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.
59  plasmin inhibition
(29 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.
60  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.
61  pancreatic islets
(27 times)
Transplantation
(7 times)
GK (3 times)
MRI (3 times)
BN (2 times)
1999 [Odontogenic focus as the etiology of cerebral ischemia].
62  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.
63  peak-interval
(27 times)
Behavioral Sciences
(11 times)
FI (5 times)
DA (4 times)
MAP (2 times)
1996 Cyclic responding by pigeons on the peak timing procedure.
64  Pietrain
(27 times)
Veterinary Medicine
(10 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.
65  path integration
(26 times)
Biology
(7 times)
AD (2 times)
LDA (2 times)
VE (2 times)
1988 Apnea-onset definition significantly affects pneumogram results.
66  Pearl Index
(26 times)
Reproductive Medicine
(16 times)
CI (5 times)
DRSP (5 times)
EE (5 times)
1993 Prospective European multi-center study of natural family planning (1989-1992): interim results. The European Natural Family Planning Study Groups.
67  proximal intestine
(26 times)
Allergy and Immunology
(19 times)
DI (21 times)
MI (18 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.
68  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.
69  placental insufficiency
(25 times)
Obstetrics
(6 times)
IUGR (9 times)
PE (2 times)
2SD (1 time)
1994 [The mechanisms of the development of pregnancy complications in hypertension and glomerulonephritis].
70  primary immunodeficiency
(24 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].
71  prostate index
(24 times)
Pharmacology
(8 times)
BPH (16 times)
COX-2 (5 times)
DHT (5 times)
2008 Antidiarrhoeal activity of the ethyl acetate extract of Baphia nitida (Papilionaceae).
72  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.
73  photoinitiator
(23 times)
Biomedical Engineering
(6 times)
CP (2 times)
DC (2 times)
EY (2 times)
2006 Stereolithography of three-dimensional bioactive poly(ethylene glycol) constructs with encapsulated cells.
74  postural instability
(23 times)
Neurology
(12 times)
PD (17 times)
BBS (3 times)
UPDRS (3 times)
2002 Postural instability in idiopathic Parkinson's disease: the role of medication and unilateral pallidotomy.
75  protein intake
(23 times)
Nutritional Sciences
(8 times)
EI (4 times)
BMI (3 times)
ALB (2 times)
1987 Adequacy studies of fistula single-needle dialysis.
76  performance-intensity
(22 times)
Audiology
(16 times)
MSTMs (2 times)
PSI (2 times)
SNRs (2 times)
1977 Use of performance-intensity functions for diagnosis.
77  periductal infiltrating
(22 times)
General Surgery
(13 times)
MF (21 times)
ICC (18 times)
IG (12 times)
2001 Predictive factors for long-term survival in patients with intrahepatic cholangiocarcinoma.
78  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.
79  post-institutionalized
(22 times)
Psychology
(13 times)
NA (7 times)
ADHD (2 times)
DSE (2 times)
2009 Postinstitutionalized children's development: growth, cognitive, and language outcomes.
80  prescribing information
(22 times)
Pharmacy
(4 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.
81  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.
82  pulvinar
(22 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.
83  phototoxic index
(20 times)
Chemistry
(11 times)
PDT (9 times)
MED (3 times)
PSs (3 times)
1975 Tar photoxicity and phototherapy for psoriasis.
84  policy iteration
(20 times)
Neural Networks (Computer)
(11 times)
RL (4 times)
ADP (3 times)
HJB (3 times)
2013 A policy iteration approach to online optimal control of continuous-time constrained-input systems.
85  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.
86  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.
87  patient involvement
(18 times)
Health Services Research
(5 times)
HTA (5 times)
ATL (1 time)
BLT (1 time)
2000 Parent Involvement in School Conceptualizing Multiple Dimensions and Their Relations with Family and Demographic Risk Factors.
88  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.
89  Prandtl-Ishlinskii
(18 times)
Biomedical Engineering
(3 times)
DIAPI (1 time)
FLSs (1 time)
I-M (1 time)
2009 Development of a piezo-actuated micro-teleoperation system for cell manipulation.
90  product information
(18 times)
Drug Therapy
(7 times)
MIMS (4 times)
ADRs (2 times)
AEs (2 times)
2003 Dosing information for paediatric patients: are they really "therapeutic orphans"?
91  annexin-propidium iodide
(17 times)
Biochemistry
(4 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.
92  parametrial involvement
(17 times)
Neoplasms
(10 times)
LVSI (6 times)
DSI (4 times)
CI (3 times)
2001 How important is removal of the parametrium at surgery for carcinoma of the cervix?
93  package insert
(16 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.
94  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.
95  phytochemical index
(16 times)
Nutritional Sciences
(5 times)
BMI (2 times)
CI (2 times)
CIs (2 times)
2002 Photoprotection in water-stressed plants of durum wheat (Triticum turgidum var. durum): changes in chlorophyll fluorescence, spectral signature and photosynthetic pigments.
96  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.
97  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].
98  psychophysiological insomnia
(16 times)
Psychophysiology
(8 times)
CBT-I (4 times)
BOLD (3 times)
GS (3 times)
1995 [Polysomnographic structure of subjective "awake" and "asleep" nocturnal segments].
99  public involvement
(16 times)
Health Services Research
(8 times)
PiiAF (3 times)
UK (2 times)
AD (1 time)
2013 Values associated with public involvement in health and social care research: a narrative review.
100  patellar instability
(15 times)
Orthopedics
(7 times)
MRI (6 times)
LTI (4 times)
TD (4 times)
2000 Patellar instability: assessment on MR images by measuring the lateral trochlear inclination-initial experience.