Related by context. Frequent words. (Click for all words.) 86 randomized trials 82 randomized clinical trials 78 RCTs 77 meta analysis 77 randomized controlled trial 76 meta analyzes 73 observational studies 70 randomized controlled 70 randomized clinical 67 epidemiological studies 66 observational study 65 randomized 64 randomized placebo controlled 63 prospective randomized 63 longitudinal studies 63 prospective cohort 63 multicenter 63 placebo controlled 62 multicenter study 60 vitamin D supplementation 60 double blind placebo 60 postmenopausal women 59 antioxidant supplements 58 clinical trial 58 statin therapy 58 randomized double 56 adjuvant chemotherapy 56 rosuvastatin 56 statins 56 blind randomized 56 clinical trials 56 longitudinal study 56 studies 56 vitro studies 56 hypertensive patients 55 pre menopausal 55 rosiglitazone 55 NEJM 55 blind randomized placebo 55 efficacy 55 statin 54 tiotropium 54 blind placebo controlled 54 donepezil 54 adjuvant therapy 54 celecoxib 53 anastrozole 53 premenopausal women 53 post hoc 53 WHI 53 citalopram 53 postmenopausal 53 sertraline 53 ticagrelor 53 prognostic factors 53 Cochrane Library 52 dose escalation 52 clinically meaningful 52 mg doses 52 inhaled steroids 52 pioglitazone 52 authors conclude 52 inhaled corticosteroids 52 pharmacodynamics 52 dosing regimens 52 heartwire 52 DSMB 51 cardiovascular mortality 51 peer reviewed 51 study 51 allopurinol 51 unblinded 51 rivaroxaban 51 Phase III trials 51 salmeterol 51 epidemiologic 51 Clinical trials 51 peer reviewed scientific 51 Lancet 51 Phase 2b study 51 sunitinib 51 post menopausal 51 bevacizumab 51 venlafaxine 51 mg dose 51 aprotinin 51 lipid lowering 51 dose aspirin 51 NSAIDs 51 placebos 51 knee osteoarthritis 50 supplementation 50 letrozole 50 statistically significant differences 50 pramipexole 50 aripiprazole 50 non inferiority 50 anticoagulation 50 clopidogrel 50 dietary intake 50 vitamin D supplements