[1] YALE UNIV,SCH MED,CLIN EPIDEMIOL UNIT,NEW HAVEN,CT 06510
[2] YALE UNIV,SCH MED,ROBERT WOOD JOHNSON CLIN SCHOLARS PROGRAM,NEW HAVEN,CT 06510
[3] UNIV CONNECTICUT,SCH MED,DEPT MED,FARMINGTON,CT 06032
[4] VET ADM HOSP,COOPERAT STUDIES PROGRAM COORDINATING CTR,W HAVEN,CT