Collagenous colitis: an underdiagnosed cause of chronic diarrhea. Portuguese Journal of Family Medicine and General Practice, [S. l.], v. 31, n. 6, p. 410–3, 2015. DOI: 10.32385/rpmgf.v31i6.11627. Disponível em: https://rpmgf.pt/ojs/index.php/rpmgf/article/view/11627. Acesso em: 17 apr. 2026.