T Kono1, A Fichera. 1. Advanced Surgery Center, Sapporo Higahsi Tokushukai Hospital, 3-1, N 33, E 14, Higahi-ku, Sapporo, Hokkaido, 065-0033, Japan; Department of Surgery, Institute of Health Biosciences, The University of Tokushima Graduate School of Medicine, Tokushima, 770-8503, Japan. kono@toru-kono.com.