1. Marc S. Atkins received his PhD in clinical psychology from Florida State University in 1985. He is currently an assistant professor of psychology in pediatrics and psychiatry at the University of Pennsylvania School of Medicine. Address: Marc Atkins, Department of Pediatrics, Division of Pediatric Psychology, Children's Hospital of Philadelphia and Children's Seashore House, 3405 Civic Center Blvd., Philadelphia, PA 19104
2. William E. Pelham received his PhD in clinical psychology from the University of New York at Stony Brook in 1976. He is currently an associate professor of psychiatry at Western Psychiatric Institute and Clinic, University of Pittsburgh School of Medicine, where he also directs the Attention Deficit Disorder Program.