Professor of Human Development, Penn State University

Professor of Epidemiology, UCLA School of Public Health

Northwestern University

University of Minnesota

University of Toronto

Indiana University, The Kinsey Institute, Dept of Gender Studies

New York State Psychiatric Institute

Professor, San Diego State University School of Public Health

Director, Toronto Sexuality Centre; Associate Professor, University of Toronto

Wolfson College, University of Cambridge; Kellogg College, University of Oxford;