Use of external control arms in immune-mediated inflammatory diseases: a systematic review by Brian G Feagan, Vipul Jairath, Claire E Parker, Christopher Ma, Siddharth Singh, John K MacDonald, Joshua Chang, Alexa Zayadi, Robert Edge, Blue Neustifter, Guowei Zhong

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Recommendations for standardizing biopsy acquisition and histological assessment of immune checkpoint inhibitor-associated colitis by Brian G Feagan, Vipul Jairath, Reetesh K Pai, Rish K Pai, Amitabh Srivastava, Christopher Ma, Christophe Rosty, David F Schaeffer, Roger M Feakins, Gregory Y Lauwers, Jonathan Krell, Richard Kirsch, Leonardo Guizzetti, John K MacDonald, Won-Tak Choi, Stefanie C McFarlane, Joanna C. Walsh

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