1. Department of General Surgery, Hospital Metropolitano & Universidad San Francisco de Quito (USFQ) , Quito , Ecuador
2. Department of General Surgery, Iess Quito-Sur , Quito , Ecuador
3. Department of Occupational Health and Safety, Iess Quito-Sur , Quito , Ecuador
4. Ministry of Health , Rural Medicine, Quito , Ecuador
5. Universidad San Francisco (USFQ), School of Medicine , Quito , Ecuador