1. Department of SurgeryUniversidad de La Frontera Temuco Chile
2. Center of Excellence in Morphological and Surgical Studies (CEMyQ)Universidad de La Frontera Temuco Chile
3. PhD Program in Medical SciencesUniversidad de La Frontera Temuco Chile
4. Department of SurgeryHospital del Mar/Institut Hospital del Mar d'Investigacions Mèdiques Barcelona Spain
5. Department of SurgeryUniversitat Autònoma de Barcelona Barcelona Spain
6. Department of MedicineUniversidad del Azuay Cuenca Ecuador