Related by context. Frequent words. (Click for all words.) 76 peer reviewed 67 peer reviewed journals 62 scientific journals 62 peer reviewed literature 62 peer reviewed journal 60 peer reviewed publications 58 scientific 58 peer reviewed papers 56 peer reviewed publication 51 randomized controlled trials 50 scientifically valid 50 meta analyzes 48 randomized clinical trials 48 epidemiological studies 48 epidemiologic studies 47 Cochrane Collaboration 47 Cochrane Library 46 journals 46 abstracts 46 meta analysis 45 Molecular Cancer 45 scientifically 45 RCTs 45 observational studies 44 randomized trials 44 efficacy 44 Scientific Advisory Committee 44 clinically relevant 44 PNAS 44 vitro studies 44 climatologists 44 PLoS ONE 43 PubMed 43 Lancet 42 journal Geophysical Research 42 ASCO Annual Meeting 42 scholarly journals 42 Nature Geoscience 42 studies 42 #:#-# [033] 42 anthropogenic global warming 42 AACR 42 #:#-# [035] 42 empirical 42 JAMA 42 Antimicrobial Agents 42 #:#-# [029] 42 empirical evidence 41 monographs 41 toxicological 41 journal PLoS Medicine 41 Medicine NEJM 41 Lancet Oncology 41 Intergovernmental Panel 41 journal Molecular 41 PLoS Medicine 41 #:#-# [028] 41 scientists 40 BMJ 40 antioxidant supplements 40 toxicity 40 Clinical Infectious Diseases 40 chromium picolinate 40 American Thoracic Society 40 Geophysical Research 40 NEJM 40 IPCC 40 journal PLoS 40 scientific rigor 40 scholarly articles 40 Nature Biotechnology 39 journal Nature 39 journal Human Reproduction 39 journal Science 39 journal Sleep 39 Alcoholism Clinical & 39 pseudoscience 39 Abstracts 39 peer reviewers 38 PLoS 38 neurotoxicity 38 research 38 PLoS Biology 38 PLoS One 38 randomized controlled 38 harmful effects 38 clinical trials 38 causal link between 38 journal PLoS ONE 38 #:#-# [006] 38 epidemiologic 38 Clinical Immunology 38 clinically meaningful 38 causal link 37 journal 37 journal Biology Letters 37 Clinical Endocrinology 37 journal Lancet 37 #:#-# [022] 37 scholarly journal 37 Review Letters