1. Research Center, Corporación de Lucha Contra el Sida, Cali, Colombia
2. Department of Public Health and Epidemiology, Pontificia Universidad Javeriana Cali, Colombia
3. School of Nursing, Queens University, Canada
4. Montefiore Medical Center, Albert Einstein College of Medicine, EEUU, New York, USA
5. Department of Public Health Science, Queens University, Kingston, Canada
6. Network of HIV clinics in Colombia Red VIHCOL, Colombia
7. Department of Medicine, Queens University, Kingston, Canada