Tal N, Tzivinikos C, Gasparetto M, Serban DE, et al. Clinical Features and Natural History of Paediatric Patients with Ulcerative
Proctitis: A Multicentre Study from the Paediatric IBD Porto Group of ESPGHAN. J Crohns Colitis 2023;17:1939-1948.
PMID: 37392064