1. General Surgery, Master Minimally Invasive Surgery, Universidad Autonoma de Barcelona, Hospital de la Santa Creu I Sant Pau, Barcelona, Spain.
2. Clínica Fleming, Department of Surgery, Lima, Perú.
3. Universidad Nacional Mayor de San Marcos, Lima, Perú.
4. Hospital Nacional Daniel Alcides Carrión, Callao, Perú.
5. Hospital Ángeles Mocel, México City, México.
6. General Surgery, Minimally Invasive Surgery, Hospital American British Cowdray, México City, México.
7. General Surgery, Universidad Nacional Mayor de San Marcos, Lima, Perú.
8. General Surgery, Fundación Hospitalaria, Buenos Aires, Argentina.
9. General and Digestive Surgery Unit, Universidad Autonoma de Barcelona, Hospital de la Santa Creu I Sant Pau, Barcelona, Spain.