[ I ]

• IFA  idiopathic fibrosing alveolitis; immunofluorescence assay; immunofluorescent antibody; incomplete Freund's adjuvant; indirect fluorescent antibody; indirect fluorescent assay; International Fertility Association; International Filariasis Association
• IFAA  International Federation of Associations of Anatomists
• IFABP  intestinal fatty acid binding protein
• IFAP  ichthyosis follicularis-atrichia-photophobia [syndrome]
• IFAT  indirect fluorescent antibody test
• IFBC  International Food Biotechnology Council
• IFC  intermittent flow centrifugation; intrinsic factor concentrate
• IFCC  International Federation of Clinical Chemistry
• IFCR  International Foundation for Cancer Research
• IFCS  inactivated fetal calf serum
• IFDS  isolated follicle-stimulating hormone deficiency syndrome
• IFE  immunofixation electrophoresis; interfollicular epidermis
• IFEV  Ife virus
• IFF  inner fracture face
• IFFH  International Foundation for Family Health
• IFG  inferior frontal gyrus; interferon gamma
• IFGO  International Federation of Gynecology and Obstetrics
• IFGS  interstitial fluid and ground substance
• IFGT  irradiation and fusion gene transfer
• IFHGS  International Federation of Human Genetics Societies
• IFHNOS  International Federation of Head and Neck Oncologic Societies
• IFHP  International Federation of Health Professionals
• IFHPMSM  International Federation for Hygiene, Preventive Medicine, and Social Medicine
• IFI  immune interferon; intensified follow-up indicator [pacemaker]
• IFIP  International Federation for Information Processing
• IFL  immunofluorescence
• IFLrA  recombinant human leukocyte interferon A
• IFM  internal fetal monitor; isoleucine, phenylalanine, and methionine
• IFMBE  International Federation for Medical and Biological Engineering
• IFME  International Federation for Medical Electronics
• IFMP  International Federation for Medical Psychotherapy
• IFMSA  International Federation of Medical Student Associations
• IFMSS  International Federation of Multiple Sclerosis Societies
• IFN  interferon
• IFNA  interferon alpha
• IFN α, β, γ  interferon alpha, beta, and gamma
• If nec  if necessary
• IFNG  interferon gamma
• IFNGT  interferon gamma transducer
• IFOS  International Federation of ORL Societies
• IFP  inflammatory fibroid polyp; insulin, compound F [hydrocortisone], prolactin; interactive filtered projection [radiotherapy]; intermediate filament protein; intimal fibrous proliferation; intrapatellar fat pad
• IFPM  International Federation of Physical Medicine
• IFR  infrared; inspiratory flow rate
• IFRA  indirect fluorescent rabies antibody [test]
• IFRP  International Fertility Research Program
• IFRT  involved field radiotherapy
• IFS  interstitial fluid space
• IFSE  International Federation of Science Editors
• IFSM  information system; International Federation of Sports Medicine
• IFSP  individualized family service plan
• IFSSH  International Federation of Societies for Surgery of the Hand; International Forum for Social Sciences in Health
• IFT  immunofluorescence test; inverse Fourier transform
• IFU  interferon unit
• IFV  interstitial fluid volume; intracellular fluid volume
• IG  immature granule; immunoglobulin; insulin and glucose; intergenic; interstitial glucose; intragastric; irritable gut
• Ig  immunoglobulin
• IGA  infantile genetic agranulocytosis
• IgA  immunoglobulin A
• IgA1, IgA2  subclasses of immunoglobulin A
• IgAGN  immunoglobulin A glomerulonephritis
• IgAN  immunoglobulin A nephropathy
• IGC  immature germ cell; intragastric cannula
• IG-CAM  immunoglobulin of cell adhesion molecule
• IGCP  intraglomerular capillary pressure
• IGD  idiopathic growth hormone deficiency; Integrated Genome Database; interglobal distance; isolated gonadotropin deficiency
• IgD  immunoglobulin D
• IgD1, IgD2  subclasses of immunoglobulin D
• IGDM  infant of mother with gestational diabetes mellitus
• IGE  idiopathic generalized epilepsy; impaired gas exchange
• IgE  immunoglobulin E
• IgE1  subclass of immunoglobulin E
• IGF  insulin-like growth factor
• IGF-I  insulin-like growth factor-I
• IGFBP  insulin-like growth factor binding protein
• IGF-I-BP  insulin-like growth factor I binding protein
• IGFBP-3  IGF-binding protein 3
• IGFET  insulated gate field effect transistor
• IGF-I-KIRA  insulin-like growth factor I kinase receptor activation
• IGFL  integral green fluorescence
• IGFR  insulin-like growth factor receptor
• IGF1R  insulin-like growth factor receptor type 1
• IgG  immunoglobulin G
• IgG1, IgG2, IgG3, IgG4  subclasses of immunoglobulin G
• IgG-SC  immunoglobulin G secreting cells
• IGH  immunoreactive growth hormone
• IgH  immunoglobulin heavy chain
• IgHC  immunoglobulin heavy chain constant region
• IGHD  immunoglobin delta heavy chain; isolated growth hormone deficiency
• IGHE  immunoglobulin epsilon heavy chain
• IGHV  immunoglobulin heavy chain variable region
• IGI  intelligent graphic interface
• IGIF  interferon-γ-inducing factor
• IGIV  immune globulin intravenous
• IGKDEL  immunoglobulin kappa deleting element
• IGL  immunoglobulin lambda; immunoglobulin light chain
• IGLJ  immunoglobulin lambda light chain J
• IGLL  immunoglobulin lambda-like
• IGLLC  inferior glenohumeral ligament labral complex
• iGluR  ionotropic glutamate receptor
• IGM  Internet Grateful Med
• IgM  immunoglobulin M
• IgM1  subclass of immunoglobulin M
• IgMN  immunoglobulin M nephropathy
• IGNS  image-guided neurosurgery
• IGO1  immunoglobulin kappa orphan 1
• IGOS  Image Guided Orthopaedic Surgery [project]
• IGP  intestinal glycoprotein
• IGR  immediate generalized reaction; integrated gastrin response
• iGrid  international grid
• IGS  image-guided surgery; inappropriate gonadotropin secretion; internal guide sequence
• Igs  immunoglobulins
• IgSC  immunoglobulin-secreting cell
• IGSF  immunoglobulin superfamily
• IGSS  immuno-gold silver staining
• IGT  impaired glucose tolerance
• IGTT  intravenous glucose tolerance test
• IGUV  Iguape virus
• IGV  intrathoracic gas volume
• IH  idiopathic hirsutism; idiopathic hypercalciuria; immediate hypersensitivity; incompletely healed; indirect hemagglutination; industrial hygiene; infantile hydrocephalus; infectious hepatitis; inguinal hernia; inhibiting hormone; in hospital; inner half; inpatient hospital; intermittent heparinization; intimal hyperplasia; intracranial hematoma; iron hematoxylin
• IHA  idiopathic hyperaldosteronism; indirect hemagglutination; indirect hemagglutination antibody; intrahepatic atresia
• IHAC  Industrial Health and Advisory Committee
• IHAPS  interactive health appraisal system
• IHBT  incompatible hemolytic blood transfusion
• IHC  idiopathic hemochromatosis; idiopathic hypercalciuria; immunohistochemical [staining assay]; immunohistochemistry; inner hair cell; interactive health communication system; Internet Healthcare Coalition; intrahepatic cholestasis
• IHCA  individual health care account; isocapnic hyperventilation with cold air
• IHCM  ichthyosis hystrix, Curth-Macklin [type]
• IHCP  Institute of Hospital and Community Psychiatry
• IHD  in-center hemodialysis; intermittent hemodialysis; ischemic heart disease
• IHDI  ischemic heart disease index
• IHDP  Infant Health and Development Program
• IHDPORT  Ischemic Heart Disease Patient Outcomes Research Team
• IHD SDP  Ischemic Heart Disease Shared Decision-Making Program
• IHES  idiopathic hypereosinophilic syndrome
• IHF  Industrial Health Foundation; integration host factor; interhemispheric fissure; International Hospital Foundation
• IHGD  isolateral human growth deficiency
• IHH  idiopathic hypogonadotropic hypogonadism; idiopathic hypothalamic hypogonadism; infectious human hepatitis
• IHHS  idiopathic hyperkinetic heart syndrome
• IHI  Institute for Healthcare Improvement
• IHIS  integrated hospital information system
• IHL  International Homeopathic League
• IHM  in-hospital malnutrition
• IHN  integrated health care network
• IHO  idiopathic hypertrophic osteo-arthropathy
• IHOU  in-hospital observation unit
• IHP  idiopathic hypoparathyroidism; idiopathic hypopituitarism; individualized health plan; inositol hexaphosphate; interhospitalization period; inverted hand position
• IHPC  intrahepatic cholestasis
• IHPH  intrahepatic portal hypertension
• IHPP  Intergovernmental Health Project Policy
• IHQL  index of health-related quality of life
• IHR  International Health Regulations; intrahepatic resistance; intrinsic heart rate
• IHRA  isocapnic hyperventilation with room air
• IHRB  Industrial Health Research Board
• IHS  idiopathic hypereosinophilic syndrome; inactivated horse serum; Indian Health Service; innovative health care system; integrated health system; International Headache Society; International Health Society; intracranial hypotension syndrome
• IHSA  iodinated human serum albumin
• IHSC  immunoreactive human skin collagenase
• IHSS  idiopathic hypertrophic subaortic stenosis
• IHT  insulin hypoglycemia test; intravenous histamine test; ipsilateral head turning
• I5HT  intraplatelet serotonin
• IHW  International Histocompatibility Workshop
• II  carcinoma of the subvaginal tissue without involving the pelvic wall [International Federation of Gynecologists and Obstetricians (FIGO) classification]; endometrial carcinoma involving the corpus and cervix but no other tissues [International Federation of Gynecologists and Obstetricians (FIGO) classification]; icterus index; image intensification or intensifier; involvement of two or more lymph nodes on the same side of the diaphragm [Ann Arbor staging system for Hodgkin disease]
• I&I  illness and injuries
• Ii  incision inferius
• IIA  internal iliac artery
• IIC  ineffective individual coping
• IICP  increased intracranial pressure
• IID  independent identically distributed [nucleotides]; insulin-independent diabetes
• IIDM  insulin-independent diabetes mellitus
• IIE  idiopathic ineffective erythropoiesis
• II_E  localized involvement of an extrahepatic organ or site [Ann Arbor staging system for Hodgkin disease]
• IIEF  International Index of Erectile Function
• i-IEL  intestinal intraepithelial lymphocyte
• IIF  immune interferon; indirect immunofluorescence; intracellular ice formation; isolated intraperitoneal fluid
• IIFT  intraoperative intraarterial fibrinolytic therapy
• IIG  imagineering interest group; interactive image-guided [surgery]
• IIGR  ipsilateral instinctive grasp reaction
• IIH  idiopathic infantile hypercalcemia
• IIHD  Israeli Ischemic Heart Disease [study]
• III  endometrial carcinoma extending outside the uterus but not outside the true pelvis [International Federation of Gynecologists and Obstetricians (FIGO) classification]; involvement of two or more lymph node regions on both sides of the diaphragm [Ann Arbor staging system for Hodgkin disease]; vaginal carcinoma extending to pelvic wall [International Federation of Gynecologists and Obstetricians (FIGO) classification]
• III_E  localized involvement of an extrahepatic organ or site [Ann Arbor staging system for Hodgkin disease]
• III-para  tertipara
• III_S  localized involvement of the spleen [Ann Arbor staging system for Hodgkin disease]
• III_SE  localized involvement of an extrahepatic organ and spleen [Ann Arbor staging system for Hodgkin disease]
• IIME  Institute of International Medical Education
• IIMS  Interest in Internal Medicine Scale
• IIOP  Internet inter object request broker protocol
• IIP  idiopathic interstitial pneumonia; idiopathic intestinal pseudo-obstruction; increased intracranial pressure
• II-para  secundipara
• I-123 IPPA  I-123 Iodo-Phenylpentadecanoic Acid [Viability Multicenter Study]
• IIR  infinite impulse response; Internet information retrieval
• IIS  intensive immunosuppression; International Institute of Stress; Internet information server; [Microsoft] Internet Information Service
• IIT  induction of immune tolerance; ineffective iron turnover; intensive insulin therapy; interactive image tool
• IITF  Information Infrastructure Task Force
• IIUK  Intraoperative Intra-Arterial Urokinase [study]
• IIVS  Institute for In-Vitro Sciences
• IJ  ileojejunal; internal jugular; intrajejunal; intrajugular
• IJCAI  International Joint Conference on Artificial Intelligence
• IJD  inflammatory joint disease
• IJP  inhibitory junction potential; internal jugular pressure
• IJV  internal jugular vein
• IK  immobilized knee; immune body [Ger. Immunekrper]; Infusoria killing [unit]; interstitial keratitis

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