Edward Laumann, Ph.D.
Department of Sociology and
Stouffer Center for Population and Social Organization
University of Chicago

William C. Holmes, M.D., M.S.C.E.
Center for Health Equity Research and Promotion
Philadelphia VA Medical Center and Center for Clinical Epidemiology and Biostatistics
University of Pennsylvania School of Medicine

Beatrice J. Krauss, Ph.D.
Department of Urban Public Health and
Hunter Center for Community and Urban Health
Hunter College, City University of New York

SEROSORTING AND SEROSCREENING: THE CHANGING FACE OF SEXUAL RISK REDUCTION AMONG GAY AND BISEXUAL MEN

Michael Stirratt, Ph.D.
HIV Center for Clinical and Behavioral Studies
Columbia University and NY State Psychiatric Institute