Risk-Taking

• Center for HIV Educational Studies and Training — New York, United States

• Child Study Center — New Haven, Connecticut, United States

• Andreas Neumayr — Basel, Canton of Basel-City, Switzerland
• University of Zurich, Epidemiology, Biostatistics and Prevention Institute, Travel Clinic — Zurich, Switzerland

• Instituto Mexicano del Seguro Social — Guadalajara, Jalisco, Mexico

• Institute of Applied Health Research, University of Birmingham — Birmingham, United Kingdom

• Dallas County CSCD — Dallas, Texas, United States
• Tarrant County CSCD — Fort Worth, Texas, United States
• Harris County CSCD — Houston, Texas, United States

Not specified

• Rhode Island Hospital- Bradley Hasbro Children's Research Center — Providence, Rhode Island, United States

• Center for the Study of Health and Risk Behaviors — Seattle, Washington, United States

• university of Bojnord — Bojnourd, North Khorasan, Iran