Department of Comprehensive Cancer Treatment and Research at Aizu, Fukushima Medical University; Department of Gastrointestinal Tract Surgery, Fukushima Medical University; Corresponding author at: Department of Comprehensive Cancer Treatment and Research at Aizu, Fukushima Medical University, 1 Hikarigaoka, Fukushima, Fukushima 960-1295, Japan.
Koji Kono
Department of Gastrointestinal Tract Surgery, Fukushima Medical University