1. University of Colorado; Denver, CO 80205 (Platt, Gaspar)State University of New York at Stony Brook; Stony Brook, NY 11794 (Coulehan)Renal Medical Associates Ltd.; Albuquerque, NM 97106 (Fox)Brooklyn Veterans Affairs Medical Center; Brooklyn, NY 11209 (Adler)University of Western Ontario; London, Ontario NGK 1C7, Canada (Weston)Michigan State University School of Medicine; East Lansing, MI 48824 (Smith)Centre for Studies in Family Medicine; London, Ontario N6G 4X8, Canada (Stewart)