For all data collection, adolescents and their peers provided informed assent, and their parents provided informed consent before each interview session. Interviews took place in private offices within a university academic building. Adolescents, parents, and peers were all paid for their participation. Participants' data were protected by a Confidentiality Certificate issued by the U.S. Department of Health and Human Services, which further protects information from subpoena by federal, state, and local courts. If necessary, transportation and child care were provided to participants.
