[1] Saga Univ, Saga, Japan
[2] Toranomon Gen Hosp, Tokyo, Japan
[3] Nagasaki Univ, Grad Sch Biomed Sci, Nagasaki, Japan
[4] St Marianna Univ, Dept Clin Oncol, Sch Med, Kawasaki, Kanagawa, Japan
[5] Imamura Gen Hosp, Kagoshima, Japan
[6] Kyushu Univ, Dept Surg & Sci, Grad Sch Med Sci, Fukuoka, Japan
[7] Natl Kyushu Med Ctr, Fukuoka, Japan
[8] Kyushu Univ, Beppu Hosp, Beppu, Oita, Japan
[9] Nakatsu Municipal Hosp, Nakatsu, Japan
[10] Natl Hosp Org Beppu Med Ctr, Beppu, Oita, Japan
[11] Univ Occupat & Environm Hlth, Kitakyushu, Fukuoka, Japan
[12] Iizuka Hosp, Iizuka, Fukuoka, Japan
[13] Yamaguchi Univ, Grad Sch Med, Dept Biostat, Yamaguchi, Japan
[14] Japan Community Healthcare Org Kyushu Hosp, Dept Hematol Oncol, Kitakyushu, Fukuoka, Japan
[15] Gunma Univ Hosp, Maebashi, Gumma, Japan
[16] Kumamoto Univ, Grad Sch Med Sci, Dept Surg Gastroenterol, Kumamoto, Japan
[17] Kyushu Univ, Dept Surg & Sci, Fukuoka, Japan