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Ungaro, Ryan C., Manasi Agrawal, Erica J. Brenner, Xian Zhang, Jean Frederic Colombel, Michael Kappelman, and Walter Reinisch. "Fr498 NEW GASTROINTESTINAL SYMPTOMS ARE COMMON IN INFLAMMATORY BOWEL DISEASE PATIENTS WITH COVID-19: DATA FROM AN INTERNATIONAL REGISTRY." Gastroenterology 2021.

Ungaro, Ryan C., et al. "Fr498 NEW GASTROINTESTINAL SYMPTOMS ARE COMMON IN INFLAMMATORY BOWEL DISEASE PATIENTS WITH COVID-19: DATA FROM AN INTERNATIONAL REGISTRY." Gastroenterology 2021.