1. Colegio de la Salud, Escuela de Salud Pública, Universidad San Francisco de Quito, Ecuador.
2. Consultor independiente, Quito, Ecuador.
3. Visor Análisis Estadístico Cia. Ltda., Quito, Ecuador.
4. Manitoba Centre for Health Policy, Department of Community Health Sciences, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, Manitoba, Canada.
5. marcelo.urquia@umanitoba.ca