1. Department of Medicine, Queen’s University, Kingston, Canada
2. Department of Public Health Sciences, Queen’s University, Kingston, Canada
3. Hospital Universitario del Valle Evaristo García, Unidad de Epidemiología, Universidad del Valle, Cali, Colombia
4. Albert Einstein College of Medicine and Montefiore Medical Center, Division of Infectious Diseases, Bronx, NY, USA
5. Pontificia Universidad Javeriana, Cali, Colombia
6. Queen’s University, School of Nursing. Kingston Ontario, Canada
7. Corporación de Lucha Contra el SIDA, Cali, Colombia