[1] Univ Med Ctr Utrecht, Gastroenterol & Hepatol, Utrecht, Netherlands
[2] Rijnstate Hosp, Gastroenterol & Hepatol, Arnhem, Netherlands
[3] Amphia Hosp, Gastroenterol & Hepatol, Breda, Netherlands
[4] Meander Med Ctr, Gastroenterol & Hepatol, Amersfoort, Netherlands
[5] Isala, Gastroenterol & Hepatol, Zwolle, Netherlands
[6] Univ Med Ctr Utrecht, Pathol, Utrecht, Netherlands
[7] Gelderse Vallei, Gastroenterol & Hepatol, Ede, Netherlands
[8] Groene Hart Hosp, Gastroenterol & Hepatol, Gouda, Netherlands
[9] Flevo Hosp, Gastroenterol & Hepatol, Almere, Netherlands
[10] Ctr Comprehens Canc, Utrecht, Netherlands