[1] Kansai Med Univ, Dept Lower Gastrointestinal Surg, Hirakata, Japan
[2] Osaka Univ, Grad Sch Med, Dept Gastroenterol Surg, Suita, Osaka, Japan
[3] Kyushu Univ, Grad Sch Med Sci, Dept Surg & Sci, Fukuoka, Japan
[4] Osaka Gen Med Ctr, Dept Gastroenterol Surg, Osaka, Japan
[5] Yokohama City Univ, Med Ctr, Gastroenterol Ctr, Dept Surg, Yokohama, Japan
[6] Yokohama City Univ, Med Ctr, Gastroenterol Ctr, Yokohama, Japan
[7] Osaka Univ, Grad Sch Med, Dept Gastroenterol Surg, Suita, Osaka, Japan
[8] Osaka Univ, Dept Gastroenterol Surg, Suita, Osaka, Japan
[9] Univ Tokyo, Grad Sch Med, Dept Biostat, Tokyo, Japan
[10] Natera Inc, Austin, TX USA
[11] Natl Canc Ctr Hosp East, Dept Gastroenterol & Gastrointestinal Oncol, Kashiwa, Japan