1. School of Public Health, Faculty of Medicine, University of Chile, Santiago, Chile
2. Laboratorio de Fisiología y Fisiopatología del Desarrollo, Programa de Fisiopatología, ICBM, Facultad de Medicina, Universidad de Chile, Santiago, Chile
3. Centro Internacional de Estudios Andinos (INCAS), Universidad de Chile, Santiago, Chile
4. Department of Epidemiology, School of Public Health, Faculty of Medicine, University of Chile, Santiago, Chile