1. Victor W. Sidel, Department of Epidemiology and Social Medicine, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, New York. Correspondence Address: Victor W. Sidel, M.D. Montefiore Medical Center Albert Einstein College of Medicine 111 East 210th Street Bronx, N.Y. 10467-2490 USA
2. Department of Public Health, Yale University, New Haven, Connecticut