1. Unidad de Cirugía Cardiovascular de Guatemala and Fundación Aldo Castañeda Guatemala City Guatemala
2. Friedman School of Nutrition Science and Policy at Tufts University Boston Massachusetts
3. Division of Public Health Sciences, Department of Surgery Washington University School of Medicine St Louis Missouri
4. Center for Indigenous Health Research Wuqu’ Kawoq | Maya Health Alliance Tecpán Chimaltenango Guatemala
5. Instituto de Investigación y Estudios Superiores en Salud, Universidad Rafael Landivar Guatemala City Guatemala