Affiliation: | 1. Instituto de Higiene e Medicina Tropical, Universidade Nova de Lisboa, Departamento de Saúde Internacional, Lisbon, Portugal,;2. Johns Hopkins Bloomberg School of Public Health, Department of Health, Behavior and Society, Baltimore, MD, USA,;3. University of Connecticut School of Medicine, Department of Community Medicine and Health Care, Farmington, CT, USA,;4. Medical Research Council, Alcohol and Drug Abuse Research, UnitStellenbosch University, South Africa |