[1] Hokkaido Univ, Grad Sch Med, Dept Gastroenterol & Hepatol, Sapporo, Hokkaido, Japan
[2] Hokkaido Univ Hosp, Diagnost Ctr Sonog, Sapporo, Hokkaido, Japan
[3] Hakodate Hosp, Natl Hosp Org, Dept Gastroenterol, Hakodate, Hokkaido, Japan
[4] Tomakomai City Hosp, Dept Clin Lab, Tomakomai, Japan
[5] Tomakomai City Hosp, Dept Gastroenterol, Tomakomai, Japan
[6] Sapporo Higashi Tokushukai Hosp, Dept Clin Lab, Sapporo, Hokkaido, Japan
[7] Sapporo Higashi Tokushukai Hosp, Ctr Inflammatory Bowel Dis, Sapporo, Hokkaido, Japan
[8] Ohguro Gastroenterol Hosp, Dept Clin Lab, Sapporo, Hokkaido, Japan
[9] Ohguro Gastroenterol Hosp, Dept Gastroenterol, Sapporo, Hokkaido, Japan
[10] Sapporo Med Ctr NTT EC, Dept Clin Lab, Sapporo, Hokkaido, Japan
[11] Sapporo Med Ctr NTT EC, Dept Gastroenterol, Sapporo, Hokkaido, Japan