Evaluating the optimum number of biopsies to assess histological inflammation in ulcerative colitis: a retrospective cohort study

Robert Battat, Niels Vande Casteele, Rish K. Pai, Zhongya Wang, Guangyong Zou, John W.D. McDonald, Marjolijn Duijvestein, Jenny Jeyarajah, Claire E. Parker, Tanja Van Viegen, Sigrid A. Nelson, Brigid S. Boland, Siddharth Singh, Parambir S. Dulai, Mark A. Valasek, Brian G. Feagan, Vipul Jairath, William J. Sandborn