Related by context. Frequent words. (Click for all words.) 77 RCTs 71 meta analyzes 70 randomized controlled trials 70 placebo controlled studies 70 randomized controlled clinical trials 68 randomized trials 67 subgroup analyzes 67 randomized clinical trials 66 placebo controlled trials 66 liver transplant recipients 65 liver biopsies 65 multivariate analyzes 64 placebo controlled clinical trials 64 nonrandomized 63 retrospective cohort study 63 lipid lowering therapy 62 epidemiologic studies 62 endoscopists 62 immunohistochemical 61 meta analysis 61 observational studies 61 HSCT 61 univariate 60 Randomized controlled 60 prospective observational 60 nonadherence 60 generalizability 60 longitudinal studies 60 mycophenolate mofetil 60 ERCP 60 histopathological 59 antibiotic prophylaxis 59 prespecified 59 Arch Intern Med 59 ALLHAT 59 ANOVA 59 lipid lowering drugs 59 FDG PET 59 concomitant medications 59 warfarin therapy 59 confounding variables 59 NHANES III 59 SYNTAX 58 placebo controlled clinical 58 IQWiG 58 neoadjuvant 58 chemoradiotherapy 58 subanalysis 58 antihypertensive drugs 58 TRITON TIMI 58 affective disorders 58 nonoperative 58 ClinicalTrials.gov 58 postoperative complications 58 HRQOL 58 Thrombolysis 58 psychotherapies 58 neuropsychiatric symptoms 57 liver biopsy 57 comorbid conditions 57 univariate analysis 57 logistic regression 57 cystectomy 57 randomisation 57 rEEG 57 alteplase 57 J Clin Oncol 57 preoperatively 57 dose regimens 57 genetic polymorphisms 57 epidemiological studies 57 coronary revascularization 57 haematological 57 histologic 57 vitro experiments 57 androgen deprivation 57 secondary efficacy endpoints 57 tolvaptan 57 covariates 57 breast carcinoma 57 genotypic 56 superficial bladder cancer 56 SAEs 56 Response Evaluation Criteria 56 substudy 56 RRMS patients 56 toxicological studies 56 nesiritide 56 fluoxetine Prozac 56 RTOG 56 tamoxifen therapy 56 prospective randomized controlled 56 randomized controlled trial 56 ACC AHA 56 noninferiority 56 regression analyzes 56 echocardiographic 56 active comparator 56 RECIST criteria 56 antiplatelet agents 56 empiric