M. Athearn

Long-term (5 year) results of coronary bypass surgery in patients 65 years old or older: a report from the Coronary Artery Surgery Study.

R. Kronmal, B. Gersh, T. Ryan, 1983, Circulation.

Comparison of coronary artery bypass surgery and medical therapy in patients 65 years of age or older. A nonrandomized study from the Coronary Artery Surgery Study (CASS) registry.

R. Kronmal, B. Gersh, T. Ryan, 1985, The New England journal of medicine.

VASECTOMY AND UROLITHIASIS

T. Killip, J. Krieger, E. Alderman, 1988, The Lancet.