1. Department of General Surgery Universidad El Bosque Bogota Colombia
2. Department of Vascular Surgery and Angiology Hospital Militar Central Bogota Colombia
3. Medical and Surgical Research Center Colombian Surgery Association Bogota Colombia
4. Grupo Prometheus y Biomedicina Aplicada a las Ciencias Clínicas Universidad de Cartagena Cartagena Colombia
5. School of Medicine Universidad de los Andes Bogota Colombia
6. International Coalition on Surgical Research Universidad Nacional Autónoma de Nicaragua Managua Nicaragua
7. Department of Surgery Hospital Carlos Roberto Huembes Managua Nicaragua