Are clinical trials the "gold standard" for cancer prevention research?
Kristal
Alan R
AR
D035843:Biomedical Research / Q000639:trends*; D002986:Clinical Trials as Topic; D006801:Humans; D009369:Neoplasms / Q000517:prevention & control*; D012107:Research Design; D012643:Selenium / Q000494:pharmacology; D013997:Time Factors; D014810:Vitamin E / Q000494:pharmacology
D014810:Vitamin E; D012643:Selenium