1 General and Digestive Surgery Department, Colorectal Surgery Unit, Donostia University Hospital, Biodonostia Research Institute, Beguiristain Doktorea Pasealekua s/n, 20014 Donostia-San Sebastián, Spain. Electronic address: ignacioaguirreallende@gmail.com.
2 General and Digestive Surgery Department, Colorectal Surgery Unit, Donostia University Hospital, Biodonostia Research Institute, Beguiristain Doktorea Pasealekua s/n, 20014 Donostia-San Sebastián, Spain.