Related by context. Frequent words. (Click for all words.) 57 Observational studies 56 confounding variables 54 methodological 52 generalizability 52 meta analyzes 51 RCTs 51 epidemiologic studies 51 IQWiG 51 nonadherence 51 neuropsychiatric symptoms 51 unvalidated 50 renal toxicity 50 procedural irregularities 50 subgroup analyzes 48 aetiology 48 statistical anomalies 48 vitamin D deficiencies 48 somatic symptoms 48 undertreatment 48 cardiac toxicity 48 behavioral abnormalities 48 systemic toxicity 48 placebo controlled studies 47 anecdotal observations 47 statin medications 47 inconsistencies 47 hyperbilirubinemia 47 morbidities 47 confounding factors 47 hepatotoxicity 47 etiologies 47 nonrandomized 47 histopathological 47 pharmacological interventions 47 liver toxicity 47 hypoxemia 47 patchiness 47 comorbid conditions 46 biologically plausible 46 micronutrient deficiencies 46 epidemiologically 46 findings 46 perinatal mortality 46 confounders 46 methodologically 46 COPD exacerbations 46 inefficacy 46 congenital malformations 46 toxicological studies 46 multivariate analyzes 46 multifactorial 46 covariate 46 placebo controlled trials 46 meningiomas 46 neurologic symptoms 46 thrombotic events 46 overdiagnosis 46 surrogate markers 46 nutrient deficiency 45 observational studies 45 microvascular complications 45 congenital abnormalities 45 endocrine disruption 45 Iron deficiency 45 elevated CRP 45 potentially modifiable 45 discrepant 45 therapeutic regimens 45 heterogeneity 45 QT prolongation 45 regression analyzes 45 genetic polymorphisms 45 Methodological 45 hypoglycemic events 45 discrepancies 45 pharmacoeconomic 45 Epidemiological studies 45 ethnic disparities 45 reproductive toxicity 45 thyroid dysfunction 45 congenital anomalies 45 peer reviewed literature 45 nonsense mutations 45 epidemiological studies 45 False positives 45 ALLHAT 44 Racial disparities 44 misdiagnoses 44 Clinical Gastroenterology 44 nonresponse 44 autistic traits 44 deficiencies 44 Cochrane Database 44 ANAO 44 thromboembolism 44 retinyl palmitate 44 neurodevelopmental disorder 44 systemic failings 44 comorbidities 44 multidrug resistance 44 physiological mechanisms