1. Instituto de Higiene e Medica Tropical & GHTM, Universidade Nova de Lisboa; Lisboa Portugal
2. Department of Community Medicine and Health Care; University of Connecticut School of Medicine; Farmington USA
3. Department of Health, Behavior and Society; Johns Hopkins Bloomberg School of Public Health; Baltimore Maryland USA
4. Alcohol, Tobacco and Other Drug Research Unit; South African Medical Research Council; Cape Town South Africa
5. Department of Psychiatry; Stellenbosch University; Cape Town South Africa