Rectal biopsy for diagnosis of intestinal neuronal dysplasia in children: a prospective multicentre study on interobserver variation and clinical outcome
S Koletzko, I Jesch, T Faus-Keβler, J Briner, W Meier-Ruge, H Müntefering, W Coerdt, L Wessel, K M Keller, W Nützenadel, P Schmittenbecher, A Holschneider, P Sacher
Gut Jun 1999, 44 (6) 853-861; DOI: 10.1136/gut.44.6.853