Department of Anatomy, Tokyo Medical University, 6-1-1 Shinjuku, Shinjukuku, Tokyo 160-8402, Japan;
Department of Gastroenterologie Surgery,Kanazawa University, 13-1 Takara-Machi, Kanazawa 920-8420,Japan;
Third Department of Surgery, Tokyo Medical Kanazawa University, 13-1 Takara-Machi, Kanazawa 920-8420,Japan;
Department of Anatomy and Neuroembryology,Kanazawa University, 13-1 Takara-Machi, Kanazawa 920-8420,Japan;