University of Pennsylvania, Philadelphia, Pennsylvania, United States
University of Pennsylvania, Philadelphia, Pennsylvania, United States
Tobacco Use Research Center, Philadelphia, Pennsylvania, United States
University of Pennsylvania, Philadelphia, Pennsylvania, United States
Emory University, Rollins School of Public Health, Atlanta, Georgia, United States
Syracuse University, Department of Psychology, Syracuse, New York, United States
University of South Carolina, Arnold School of Public Health, Columbia, South Carolina, United States
Kiev City AIDS Center, Kiev, Ukraine
City AIDS Center, Kiev, Ukraine
Psychopathology Resarch Unit, Department of Psychiatry, University of Pennsylvania, Philadelphia, Pennsylvania, United States
Abramson Cancer Center of University of Pennsylvania, Philadelphia, Pennsylvania, United States
University of Pennsylvania, Philadelphia, Pennsylvania, United States
John Millar, Philadelphia, Pennsylvania, United States
University of Pennsylvania, Philadelphia, Pennsylvania, United States