PeerJ Author 135 Points Contributions by role Author 135 Contributions by subject area Clinical Trials Epidemiology Gastroenterology and Hepatology Immunology Internal Medicine Yuegui Guo PeerJ Author Summary Clinical Trials Epidemiology Gastroenterology & Hepatology Immunology Internal Medicine PeerJ Contributions Articles 1 June 21, 2019 Clinical outcomes and risk factors of secondary extraintestinal manifestation in ulcerative colitis: results of a multicenter and long-term follow-up retrospective study Weimin Xu, Weijun Ou, Yuegui Guo, Yubei Gu, Long Cui, Jie Zhong, Peng Du https://doi.org/10.7717/peerj.7194 PubMed 31304061