1. The National Diet-Heart Study Final Report;Circulation,1968
2. Regression towards mediocrity in hereditary stature;Galton;J Anthropol Inst,1885
3. The floor-and-ceiling effect;Schor;JAMA,1969
4. The Effect of Plasma Cholesterol Lowering Diet in Male Survivors of Myocardial Infarction;Leren,1966
5. Dayton S: Personal communication. Changes are measured from baseline to mean at first four follow-up visits at 4-month intervals.