Joseph Volpicelli, M.D., Ph.D., is Associate Professor of Psychiatry at the University of Pennsylvania and Senior Scientist at the Penn/VA Center for Research on Addictive Diseases. He has appeared on ABC, NBC, CNN, and CBS-TV. Maia Szalavitz has written for the Village Voice, the New York Times, and the Washington Post. She was series researcher for Bill Moyers's five-part series on addiction and has appeared as a guest on Oprah.