1. Laurin P, Wolving M, Fälth-Magnusson K (2002) J Pediatr Gastroenterol Nutr 34:26–30
2. Picarelli A, Maiuri L, Frate A, Greco M, Auricchio S, Londei M (1996) Lancet 348:1065–1067
3. Pruessner HT (1998) Am Fam Physician 57:1023–1034, 1039–1041
4. Fasano A, Catassi C (2001) Gastroent 120:636–651
5. Chirdo FG, Zwirner NW, Rumbo M, Fossati CA (2002) Clin Chim Acta 317:151–158