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A
Abnormal Uterine Bleeding23Absence Seizures12Accounting14ACE Inhibitors32Acetylcholine25Acetylcholine Receptors12Acetylcholinesterase Inhibitors12Acid47Acid Base21ACID BASE Balance14Acids29ACNE Vulgaris14Action14Activation Energy31Active Immunity14Active Transport29Active Transport Mechanisms17Acute17Acute Kidney Injury23Acute Lymphoblastic Leukemia14Acute Pancreatitis14Acute Respiratory Distress Syndrome20Acute Tubular Necrosis12Adaptive Immunity27Adaptive Radiation12Addison Disease29Adolescent14Adrenal13Adrenal Insufficiency16Adrenergic15Adrenergic Receptors16Adrenocorticotropic Hormone18Advance Directives21Adverse Childhood Experiences17Adverse DRUG Reactions15Aerobic Metabolism12Aerobic Respiration13AGE16Aging26Agonists13Airway Resistance12Aldosterone Antagonists13Aldosterone Regulation14Algorithms12Allergic Rhinitis12Allosteric Regulation30Alpha Adrenergic Blockers12Alterations22Alternative Splicing29Alveolar GAS Exchange13Alzheimers Disease13Amino Acids27Amniocentesis16Amniotic Fluid Embolism15Amphipathic Molecules15Amyotrophic Lateral Sclerosis15Anaerobic Glycolysis16Analysis36Anaphylactic Shock13Anatomy24Angina Pectoris16Angiog12Angiotensin Receptor Blockers23Animal13Anorexia Nervosa30Antagonists19Antibiotic Resistance19Antibiotic Resistance Mechanisms16Antibody Production14Anticholinergic Effects16Anticipatory Grief12Anticipatory Guidance27Anticoagulation Therapy24Antidiuretic Hormone35Antigen Presentation16Antimicrobial92Antimicrobial Resistance21Antiplatelet Therapy13Antipsychotic Medications24Antiretroviral Therapy34Anxiety Disorders18Aplastic Anemia17Apoptosis15Arterial Blood GAS Analysis14Artificial Selection12Aspiration Prevention18Asthma Pathophysiology17Atomic13Atoms12Atopic Dermatitis19ATP Hydrolysis18ATP Synthase16ATP Synthesis14Atrial Fibrillation23Atrial Natriuretic Peptide12Atrial Septal Defect15Atrioventricular NODE23Attachment Theory17Attention13Attention Deficit Hyperactivity Disorder36Atypical Antipsychotics19Autism Spectrum Disorder26Autocrine Signaling15Autonomic Dysreflexia13Autonomic Nervous26Autosomal Dominant Inheritance20Autosomal Recessive Inheritance21
B
Babinski Reflex12Bacterial41Bacterial Meningitis24Bacterial Vaginosis20Balance24Baroreceptor Reflex28Basal CELL Carcinoma21Basal Ganglia16Basal Metabolic RATE21BASE Excision Repair16Beers Criteria15Behavior27Behavioral Ecology18Benign Prostatic Hyperplasia42Benzod16BETA Adrenergic Blockers16BETA Blockers19BETA Lactam Antibiotics13BETA Oxidation16BILE ACID Sequestrants12Bilirubin Metabolism12Binge Eating Disorder13Biofilm Formation16Biological91Bipolar Disorder16Birth36Bisphosphonate Therapy14Bladder Exstrophy12Blood57Blood Brain Barrier36Blood Pressure39Blood Pressure Regulation21Blood UREA Nitrogen12Body29BODY Image Disturbance12BODY MASS Index14BOHR Effect14Bonding17BONE Marrow Suppression31BONE Mineral Density15BONE Remodeling21Brady12Brain38BRCA Mutations12Breast14Bronchopulmonary Dysplasia15Brown Adipose Tissue21Bulimia Nervosa27BURN Depth Classification13
C
Calcium14Calcium Channel Blockers33Calcium Homeostasis28Calcium Signaling24Cancer42Candidiasis12Caput Succedaneum12Carbocation Intermediate13Carbon20Carbon Carbon BOND Formation13Carbon Monoxide Poisoning14Carbonic Anhydrase Inhibitors14Cardiac30Cardiac Arrhythmias12Cardiac Catheterization16Cardiac Output28Cardiac Tamponade15Cardiogenic Shock24Cardiovascular56Caregiver Burden14Carpal Tunnel Syndrome17Catecholamine Release14Celiac Disease21Cell162Cell Cycle21CELL Cycle Checkpoints12CELL Cycle Phases13CELL Cycle Regulation15CELL Differentiation18CELL Mediated Immunity26Central Dogma14Central Nervous20Cephalosporins15Cerebral Cortex12Cerebral Edema13Cerebrospinal Fluid13Cerumen Impaction13Cervical Cancer Screening12Cervical Dilation22Cervical Effacement15Change15Chelation Therapy14Chemical46Chemistry32Chemoreceptor Trigger ZONE12Chemotherapy16Child62Childhood21Childhood Obesity Prevention12Children112Children Adolescents12Chlamydia Trachomatis16Cholecy16Cholinesterase Inhibitors18Chorionic Villus Sampling18Chromatin Remodeling27Chromosomal Abnormalities22Chromosomal Translocations13Chronic57Chronic Inflammation12Chronic Kidney Disease26Chronic Obstructive Pulmonary Disease30Circadian Rhythm Regulation15Circadian Rhythms13Circulation13CIS Trans Isomerism15Citric ACID Cycle31Classical Conditioning13Clinical45Clinical Judgment17Coagulation Cascade20Cognition19Cognitive38Cognitive Behavioral Therapy85Cognitive Distortions14COLD Stress Prevention12Collecting DUCT13Communication24Community54Community Acquired Pneumonia12Community Health Nursing42Comparative Genomics19Compartment Syndrome27Competitive Inhibition12Complementary Alternative Medicine13Complementary BASE Pairing16Complications37Compounds23Concrete Operational Stage14Conditions51Conductive Hearing LOSS34Congenital Adrenal Hyperplasia23Congenital Heart Defects14Congenital Heart Disease12Congenital Hypothyroidism13Conjugate ACID BASE Pairs13Consciousness37Contact Dermatitis16Continuous Positive Airway Pressure14Contraceptive Counseling13Convergent Evolution12Cooperative PLAY14Cord12Coronary Artery Disease21Coronary Circulation13Covalent Bonding16Creatinine Clearance13Crossing OVER13Cryptor14Cultural23Cultural Competence37Cultural Competence Nursing14Cultural Humility13Cushing Syndrome34Cyclic AMP14Cyclic AMP Signaling14Cyclin Dependent Kinases19Cystic Fibrosis22Cytokine Signaling17
D
Data24DEEP Brain Stimulation17DEEP VEIN Thrombosis37Defense Mechanisms16Design40Developmental19Developmental Dysplasia HIP15Developmental Milestones29Diabetes13Diabetes Insipidus30Diabetes Mellitus15Diabetic Ketoacidosis44Diabetic Nephropathy16Diabetic Retinopathy19Diagnosis15Dialectical Behavior Therapy14Digestive16Digoxin Toxicity12Discharge Planning22Disease62Disease Modifying Antirheumatic Drugs18Diseases35Disorder26Disorders328Disseminated Intravascular Coagulation41Diversity17Dizygotic Twins13DNA57DNA Ligase24DNA Methylation34DNA Replication18DNA Replication17Dopamine Dysregulation18Dopamine Hypothesis14DOWN Syndrome31DRUG Distribution15DRUG DRUG Interactions12DRUG Interactions19DRUG Metabolism17DRUG Resistance Mechanisms14Drug Therapy61Drugs116Duchenne Muscular Dystrophy22Ductus Arteriosus25Ductus Arteriosus Closure15Ductus Venosus19Dysfunction Children23Dyspnea14
E
EAR22Earth13Ectopic Pregnancy17Electrocardiogram Interpretation14Electroconvulsive Therapy21Electrolyte Balance14Electrolyte Imbalances20Electron Transport Chain38Electron Withdrawing Groups13Electronic Fetal Monitoring12Electronic Health Records21Electrophilic Aromatic Substitution18Elements26Elimination Reactions12Embedded Cognition13Embodied Cognition53Embryonic STEM Cells17Emergency12Emergency Contraception16Emerging Infectious Diseases13Emotional Intelligence14Emotional Regulation13Enactive Cognition17END12Endochondral Ossification12Endocrine50Endomet25Endoplasmic Reticulum21Endosymbiotic Theory16Endothelial Dysfunction12Energy48Energy Conservation16Enteral Nutrition13Entropy15Environmental14Enzyme Catalysis23Enzyme Induction13Enzyme Inhibition13Enzyme Kinetics12Enzymes12Epidural Anesthesia14Epidural Hematoma14Epigenetic Modifications12Epigenetic Regulation14EPIS12Epithelial Mesenchymal Transition19Epstein BARR Virus18Equilibria12Erectile Dysfunction14Erythropoiesis21Esophageal Atresia15Ethical19Evaluation36Evidence35Evidence Based24Evolution33Evolutionary13Evolutionary Psychology13Examination13Excitation Contraction Coupling18Exposure Therapy14Expression29Extracellular Matrix13Extrapyramidal Symptoms15EYE24
F
Facilitated Diffusion24Familial Hypercholesterolemia12Family48FAT Soluble Vitamins15Fatty ACID Oxidation12Feedback Inhibition22Female Reproductive28Female Reproductive Anatomy12Fetal22Fetal Alcohol Spectrum Disorder22Fetal Alcohol Syndrome13Fetal Circulation19Fetal Heart RATE Monitoring24Fetal Presentation13Fields12First Generation Antipsychotics14Flow17Fluid27Fluid Electrolyte56Fluid Electrolyte Balance14Fluid Mosaic Model19Fluid Resuscitation17Folic ACID Supplementation27Follicle Stimulating Hormone58Foramen Ovale24Foramen Ovale Closure15Forensic19Frameshift Mutations17Fundal Height Measurement15Fundal Massage15Fungi28
G
Gamete Formation15Gametogenesis15GAP Junction Communication12GAP Junctions21Gastric ACID Secretion12Gastroesophageal Reflux Disease34Gastrointestinal56GEL Electrophoresis15Gender Dysphoria12Gene Expression144GENE Expression15GENE Expression Regulation26GENE FLOW12GENE Therapy15Generalized Anxiety Disorder28Generalized Seizures14Genetic CODE13Genetic Counseling24Genetic Drift17Genetic Recombination16Genetic Variation15Genitourinary18Genomic Imprinting21Genomics30Genomics Proteomics14Gestational Diabetes Mellitus13Gestational Hypertension14Gibbs FREE Energy32Glasgow COMA Scale26Glomerular Filtration19Glomerular Filtration RATE64Glucose42Glucose Homeostasis22Glucose Metabolism12Glycolysis42Glycolysis Pathway14Golgi Apparatus18Gonadotropin Releasing Hormone30Graft Versus HOST Disease13GRAM Negative Bacteria24GRAM Positive Bacteria19Graves Disease32Group Elements22Groups13Growth53Growth Hormone Deficiency18Guillain Barre Syndrome19
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Hashimoto Thyroiditis21Health250Health Disparities44Health Equity30Health Literacy16Health Promotion20Health Promotion13Health Promotion Strategies19Healthcare Associated Infections14Heart34Heart Failure16Heisenberg Uncertainty Principle12Helicobacter Pylori Infection15Hellp Syndrome14Hematologic46Hematopoietic STEM CELL Transplantation17Hemispheric Lateralization22Hemispheric Specialization27Hemodialysis12Hemodynamic Monitoring14Hemolytic Anemia20Hemolytic Disease Newborn12Hemolytic Uremic Syndrome17Hemorrhagic Stroke13Hemostasis13Henderson Hasselbalch Equation16Heparin Induced Thrombocytopenia14Hepatic Encephalopathy19Hepatic Metabolism12Hepatotoxicity Monitoring12Herpes Simplex Virus31High Risk14Hirschsprung Disease18Histone Acetylation13Histone Modifications15History16Hodgkin Lymphoma17Homeostasis24Homeostatic Regulation18Homologous Recombination24Horizontal GENE Transfer36Hormonal Regulation13Hormone Replacement Therapy27Hormones13HPV Vaccination21Human32Human Chorionic Gonadotropin25Human Genome Project16Human Papillomavirus38Humoral Immunity24Huntington Disease13Hydrogen33Hydrogen Bonding29Hydrostatic Pressure17Hyperkalemia12Hypersensitivity Reactions27Hypertension13Hypertensive Crisis14Hypothalamic Pituitary12Hypothalamic Pituitary Adrenal AXIS45Hypothalamic Pituitary AXIS49Hypothalamic Pituitary Gonadal AXIS27Hypothalamic Pituitary Ovarian AXIS15Hypovolemic Shock32
I
Illness18Immune35Immunity19Immunocompromised Patients13Immunologic20Immunosuppressive Therapy16Inborn Errors Metabolism14Increased Intracranial Pressure13Induced Pluripotent STEM Cells16Industry Versus Inferiority12Infant18Infection24Infections44Infectious26Infective Endocarditis18Inflammatory13Inflammatory Bowel Disease29Information18Informed Consent37Inhaled Corticosteroids14Inheritance17Injury19Innate Immunity24Insulin Resistance40Insulin Signaling14Integration13Integumentary20Intellectual Disability16Interaction Design67Intermolecular Forces22Internal Energy13International Normalized Ratio12Interprofessional Collaboration33Intimate Partner Violence36Intimate Partner Violence Screening17Intracellular Receptors12Intracranial Pressure15Intraocular Pressure12Intrauterine Devices18Intrauterine Growth Restriction14Intrinsic Motivation13Inverse Square LAW14ION Channels16Ionic Bonding13Ionotropic Receptors17IRON Deficiency Anemia53Irritable Bowel Syndrome24Ischemic Stroke15
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Labor Birth37LAC Operon14Lactation Physiology18Lagging Strand Synthesis20Language24Lateral Inhibition14LAW19Laws21Leading Strand Synthesis19Learned Helplessness15LEFT Hemisphere Dominance12Legal18LEGG Calve Perthes Disease17Leptin Signaling13Leydig Cells13Ligand Gated ION Channels12Linea Nigra12Lithium Therapy13LIVE Attenuated Vaccines12Liver13LONG TERM Potentiation20LOOP Diuretics20Lower13LUNG Compliance13Luteinizing Hormone53Lymphatic23Lytic Cycle12
M
Macrolides21Magical Thinking16Magnetic15Malabsorption Syndromes13Male Reproductive24Malignant Hyperthermia18Mammography Screening13Marfan Syndrome16MASS Spectrometry21MAST CELL Stabilizers13Mastitis12Materials13Maternal14Matter13Mechanisms53Meconium Aspiration Syndrome19Medication17Medication Adherence21Medication Assisted Treatment12Medication Error Prevention14Medication Reconciliation18Medications34Megaloblastic Anemia18Meiosis Sexual17Membrane19Membrane Fluidity12Membrane Permeability13Memory28Memory Consolidation18Menopause15Menstrual Cycle Regulation16Mental Health37Mental Status Examination14Metabolic Acidosis47Metabolic Alkalosis24Metabolic Pathways13Metabolic Syndrome26Metabolism100Metabotropic Receptors17Metallic Bonding12Methicillin Resistant Staphylococcus Aureus29Methods14Microbial57Milieu Therapy18Mismatch Repair17Mitochondria17Model Organisms12Models12Molecular67Molecular Chaperones16Molecular Geometry12Molecular Orbital Theory13Monoamine Oxidase Inhibitors27Monoclonal Antibodies39Monoclonal Antibody Therapy15Monocytes17Monozygotic Twins13Mood Disorders13MOOD Stabilizers14MORO Reflex14Motion17Motivational Interviewing21Motor17Movement15Multidrug Resistant Organisms12Multidrug Resistant Tuberculosis14Multifactorial Inheritance17Muscarinic Receptors16Muscle32Musculoskeletal49Myasthenia Gravis26Mycobacterium Tuberculosis16Mycorrhizal Associations15Myelin Sheath14Myelo16Myocardial Contractility16Myocardial Infarction26
N
Narcolepsy15Natriuretic Peptides19Natural Killer Cells25Natural Selection36Necrotizing Enterocolitis20Negative Feedback Loops29Neisseria Gonorrhoeae14Neonatal Abstinence Syndrome23Neonatal Hypoglycemia22Nephrotic Syndrome25Nernst Equation19Nervous64Neural14Neural TUBE Defects51Neurofibrillary Tangles17Neurogenic Bladder12Neurogenic Shock12Neuroleptic Malignant Syndrome18Neurologic82Neuromuscular Junction23Neuropathic PAIN17Neurotransmitter Release28Neutr18Newborn42NEXT Generation Sequencing22Nicotinic Receptors16Nitric Oxide Signaling19Nitrogen Fixation21NON Hodgkin Lymphoma12Nonhomologous END Joining12Nonshivering Thermogenesis20Nonsteroidal ANTI Inflammatory Drugs17Nonverbal Communication18Norepinephrine17Normal Distribution12Northern Blotting12Nucleotide Excision Repair19Nursing295Nursing Ethics12Nursing Pharmacology13Nutrition38
O
Object Permanence19Obsessive Compulsive Disorder33Obstructive Sleep Apnea25Okazaki Fragments22Oncogenic Viruses13Oogenesis17Opioid Induced Constipation12Opportunistic Infections36ORAL Rehydration Therapy13Organic27Organization23Organometallic19Orthostatic Hypotension47Osmotic Diuretics12Osmotic Pressure14Osteogenesis Imperfecta16Osteoporosis38Otitis Media13Oxidation Reduction Reactions17Oxidative Phosphorylation44Oxytocin Administration16
P
Pain57Pancreas17Pancreatic Enzyme Replacement13Panic Disorder15Paracrine Signaling20Parallel PLAY16Parathyroid Hormone16Parathyroid Hormone Regulation12Parenteral Nutrition14Parkinson Disease12Passive Immunity22Patent Ductus Arteriosus20Pathology36Patient19Patient Advocacy20Patient Autonomy15Patient Controlled Analgesia22Patients76Pattern Recognition Receptors13Pauli Exclusion Principle13Pediatric58Pediculosis Capitis13Pedigree Analysis13Pelvic Inflammatory Disease48Pelvic Organ Prolapse13Peptic Ulcer Disease35Peptide BOND Formation22Peptide Bonds13Perception25Peripheral60Peripheral Neuropathy14Peritoneal Dialysis16Pernicious Anemia18Personality56Phagoc14Pharmacology50Pheny21Philadelphia Chromosome17Phosphate25Phospholipid Bilayer18Photosynthesis14Physical23Physical Dependence15Physical Examination Techniques14Physics12Physiology27Pituitary13Placenta Previa15Placental Abruption13Planning12Plant27Plants16Plasmid Vectors12Platelet Aggregation17Polycystic Ovary Syndrome21Polycythemia VERA12Polygenic Inheritance14Polymerase Chain Reaction35Polyp13Population15Population Genetics13Populations13Portal Hypertension24POST Translational Modifications16POST Traumatic Stress Disorder27Postpartum32Postpartum Blues15Postpartum Depression24Postpartum Hemorrhage29Postpartum Psychosis13Posttraumatic Stress Disorder27Potassium Sparing Diuretics15Precision Medicine12Precocious Puberty13Pregnancy57Premenstrual Dysphoric Disorder19Premenstrual Syndrome18Pressure Injury Prevention16Prevention12Primary Amenorrhea12Primary Immunodeficiency13Primary Prevention25Primary Prevention Strategies26Primitive Reflexes24Prion Diseases16Problems15Processing22Programmed CELL Death17Progressive Muscle Relaxation12Properties29Prostaglandin Synthesis16Prostatic Hyperplasia17Protease Inhibitors16Protein61Protein Folding22Protein Misfolding13Protein Synthesis23Protein Synthesis Inhibition20Proto Oncogenes20Proton Motive Force19Proton PUMP Inhibitors21Psychiatric33Psychiatric Nursing Interventions16Psychology74Public Health23Public Health Nursing26Pulmonary16Pulmonary Edema13Pulmonary Embolism43Purkinje Fibers12
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Randomized Controlled Trials12Reaction12Reaction Mechanisms12Reactions55Reactive Oxygen Species20Receptor Mediated Endocytosis18Recombinant DNA Technology21REED Sternberg Cells20Refeeding Syndrome12Reflex Tachycardia15Refractive Errors13Regulation65Relapse Prevention16Related26REM Sleep12Renal27Renal Replacement Therapy14Repair16Reproduction14Reproductive77Research28Resonance Stabilization21Respiratory70Respiratory Acidosis22Respiratory Alkalosis26Respiratory Depression14Respiratory Distress Syndrome34Respiratory Syncytial Virus18Restriction Enzymes13Restrictive LUNG Disease12Reverse Transcriptase21REYE Syndrome14Rheumatoid Arthritis18RIBO14Risk42RNA19RNA Interference25RNA Polymerase13Rocky Mountain Spotted Fever14
S
Saccharomyces Cerevisiae12Safety19Saltatory Conduction24Sarcoplasmic Reticulum14Schizophrenia17School AGE17Schwann Cells15Science13Second Generation Antipsychotics19Second Messengers12Secondary Active Transport17Secondary Amenorrhea12Secondary Hypertension17Secondary Prevention27Secondary Prevention Screening14Secondary SEX Characteristics15Selective Estrogen Receptor Modulators14Selective Permeability14Selective Serotonin Reuptake Inhibitors62Selective Toxicity15Self24Semiconservative Replication17Seminiferous Tubules18Sensorimotor Stage20Sensorineural Hearing LOSS33Sensory29Separation Anxiety16Septic Shock24Serotonin Dysregulation15Serotonin Norepinephrine Reuptake Inhibitors27Serotonin Syndrome23Settings13Severe Combined Immunodeficiency12Sexual20Sexual Assault Nurse Examiner14Sexually Transmitted17Sexually Transmitted Infections50Shock13Shoulder Dystocia12Sickle CELL Anemia13Sickle CELL Disease39Signal Transduction15Signal Transduction13Signal Transduction Pathways15Signaling17Single Nucleotide Polymorphisms24Sinoatrial NODE23Skeletal12Skin36Sleep20Sleep Architecture12Slipped Capital Femoral Epiphysis13Smooth Muscle Contraction15Social46Social Anxiety Disorder17Social Cognition13Sodium Channel Blockers12Sodium Potassium PUMP43Solutions12Sonic Hedgehog Signaling15Southern Blotting12Spatial Summation14Spermat28Spina Bifida15Spinal Cord14Spinal CORD Injury14Squamous CELL Carcinoma28Standard Precautions16Staphylococcus Aureus12Starling Forces16Status Epilepticus25Steroid Hormones14Stevens Johnson Syndrome28Stress34Stress Incontinence13Striae Gravidarum12Stroke Volume20Subdural Hematoma14Substance25Substitution13Sudden Infant Death Syndrome26Superposition Principle14Suprachiasmatic Nucleus15Surfactant Deficiency16Surfactant Production16Synaptic Plasticity21Synaptic Transmission44Synthesis37Systemic Lupus Erythematosus33
T
Tardive Dyskinesia22TAY Sachs Disease13Teach BACK Method18Techniques18Temporal Summation15Teratogenic Effects21Tertiary Prevention26Testicular Torsion16Theory27Therapeutic Alliance18Therapeutic Communication54Therapeutic DRUG Monitoring40Therapeutic Index15Therapeutic PLAY12Therapeutic Relationship18Therapies12Therapy60Thermodynamic Equilibrium12Thermodynamics32Thiazide Diuretics21Thrombosis15Thyroid16Thyroid Hormone Synthesis15Thyroid Parathyroid12Thyroid Stimulating Hormone26Thyroid Storm15Time18Tissue32Tissues12Torch Infections17Total Parenteral Nutrition18Toxic Shock Syndrome17Tracheoesophageal Fistula19Tract33Transcranial Magnetic Stimulation18Transcription20Transcriptional Regulation15Transfer RNA13Transition12Translation14Translation Initiation12Transmission Based Precautions15Transmitted17Transport34Transposable Elements19Trauma20Traumatic Brain Injury30Treatment26Treatment Resistant Depression12Treponema Pallidum12Tricho15Tricyclic Antidepressants33Trust Versus Mistrust17Tubular Reabsorption16Tubular Secretion12Tumor Lysis Syndrome16Tumor Suppressor Genes33Turner Syndrome24TWO12Tyrosine Kinase Inhibitors12
U
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Valence Electrons13VAN DER Waals Forces19Variation15Varicella Zoster Virus18Vascular22VASO Occlusive Crisis17Vasodilators16Vasomotor Symptoms12Venous Thromboembolism25Venous Thromboembolism Prevention14Ventricular Fibrillation18Ventricular Septal Defect17Vernix Caseosa16Vesicoureteral Reflux17Violence18Viral13Viral Hepatitis15Viruses19Visceral PAIN14Vision14Visual15Voltage Gated Channels12VON Willebrand Disease23Vulnerable Populations21