1. Universidad del Desarrollo–Clínica Alemana, Santiago, Chile.
2. University of York, York, United Kingdom.
3. National Institute of Public Health, Mexico City, Mexico.
4. Department of Public Health, Pontifical Catholic University of Chile, Santiago, Chile.
5. Institute of Public Health in Chile, Santiago, Chile.
6. Bradford Institute for Health Research, Bradford Royal Infirmary, Bradford, United Kingdom.