Gemfibrozil for the secondary prevention of coronary heart disease in men with low levels of high-density lipoprotein cholesterol. Veterans Affairs High-Density Lipoprotein Cholesterol Intervention Trial Study Group - Rubins, HB; Robins, SJ; Collins, D; Fye, CL; Anderson, JW; Elam, MB; Faas, FH; Linares, E; Schaefer, EJ; Schectman, G; Wilt, TJ; Wittes, J (N Engl J Med, 1999)