Risk factor intervention trials for coronary hea diseases are all, EXCEPT:: (A) Stanford -Three Community Study, (B) Noh Kerelia Project, (C) Lipid Research Clinics Study, (D) Single Risk Factor Intervention Trial (SR-FIT)
Answer is D. Multiple Risk Factor Intervention Trial (MRFIT) in the US is an example of this. Onslow diet/smoking intervention study is another famous trial. Ref: Park's textbook of Preventive and Social Medicine, 21st edition, page-343