1. Department of General Surgery , Hospital General San Francisco de Quito, and School of Medicine at PUCE (Pontificia Universidad Católica del Ecuador), Quito, Ecuador
2. General Surgery Training Program at Universidad Internacional del Ecuador (UIDE) , Quito, Ecuador
3. Department of General Surgery, Hospital de Especialidades Carlos Andrade Marin , Quito, Ecuador
4. Department of General Surgery, Hospital General San Francisco de Quito , Quito, Ecuador
5. Hospital Metropolitano Department of Surgery , and Colegio de Ciencias de la Salud at USFQ (Universidad San Francisco de Quito), Quito, Ecuador