Background and organization of quality control in the Multiple Risk Factor Intervention Trial.
D000328:Adult; D002986:Clinical Trials as Topic / Q000592:standards*; D003327:Coronary Disease / Q000517:prevention & control*; D004282:Documentation; D006801:Humans; D008297:Male; D008875:Middle Aged; D011786:Quality Control; D011897:Random Allocation; D012107:Research Design / Q000592:standards*; D012108:Research Personnel / Q000193:education; D012306:Risk