1. 1Organization of American States, Inter-American Drug Abuse Control Commission (CICAD), Red Latinoamericana de Investigadores en Drogas (REDLA), Washington, District of Columbia, USA
2. 2National Development Research Institutes, New York, New York, USA
3. 3Facultade de Ciênças Médicas, Universidade Federal de Ciências da Saúde de Porto Alegre, Rio Grande do Sul, Brazil
4. 4Latin American Drug Research Network, Red Latinoamericana de Investigadores en Drogas (REDLA), Washington, District of Columbia, USA
5. 5School of Social Work, University of Michigan, Ann Arbor, Michigan, USA