Justin Richardson is an assistant professor of psychiatry at Columbia and a practicing psychiatrist who lectures regularly on teens and sexuality both nationally and to the parents of New York City's finest private schools. He founded the center for gay and lesbian mental health at Columbia-Presbyterian Hospital. He resides in New York City.
Mark Schuster is a pediatrician, assistant professor of pediatrics at UCLA, and a senior natural scientist at RAND think tank, where he researches teen sexuality issues. He resides in Los Angeles.