[1] Endoscopy Division,
[2] National Cancer Center Hospital,undefined
[3] 5-1-1,undefined
[4] Tsukiji,undefined
[5] Chuo-Ku,undefined
[6] Tokyo 104-0045,undefined
[7] Japan,undefined
[8] The Center for Digestive Disease,undefined
[9] Tonan Hospital,undefined
[10] Sapporo,undefined
[11] Japan,undefined
[12] Clinical Laboratory Division,undefined
[13] National Cancer Center Hospital,undefined
[14] Tokyo,undefined
[15] Japan,undefined