1. School of Medicine, Health Sciences Faculty, Department of Surgery, Universidad Industrial de Santander, Bucaramanga, Colombia.
2. Public Health Faculty, Escuela Politécnica Superior de Chimborazo, Riobamba, Ecuador.
3. Department of Internal Medicine, Department of Surgery, Universidad Industrial de Santander, Bucaramanga, Colombia.
4. Grupo de Investigación de Cirugía y Especialidades (GRICES-UIS), Department of Surgery, Universidad Industrial de Santander, Bucaramanga, Colombia.