[1] Univ Tampere, Sch Med, FIN-33014 Tampere, Finland
[2] Univ Tampere, Tampere Ctr Child Hlth Res, FIN-33014 Tampere, Finland
[3] Tampere Univ Hosp, Tampere, Finland
[4] Tampere Univ Hosp, Dept Gastroenterol & Alimentary Tract Surg, Tampere, Finland
[5] Univ Tampere, Sch Hlth Sci, FIN-33014 Tampere, Finland
[6] Finnish Celiac Soc, Tampere, Finland
[7] Tampere Univ Hosp, Dept Gastroenterol, Tampere, Finland
[8] Tampere Univ Hosp, Dept Alimentary Tract Surg, Tampere, Finland
[9] Seinajoki Cent Hosp, Tampere, Finland