[1] Nagoya Univ, Dept Pediat Surg, Grad Sch Med, Nagoya, Japan
[2] Mie Univ, Dept Gastrointestinal & Pediat Surg, Grad Sch Med, Mie, Japan
[3] Mie Univ, Fac Med, Mie, Japan
[4] Nagoya Univ, Dept Rare Intractable Canc Anal Res, Grad Sch Med, Nagoya, Japan