1. IMEK Centro de Investigación en Mercadeo & Desarrollo, Santiago de Cali, Colombia
2. Instituto de Salud Pública, Pontificia Universidad Javeriana, Bogotá, Colombia
3. Health Behavior, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
4. Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA