https://scholar.google.com/scholar_lookup?title=COVID-19+and+Intestinal+Inflammation:+Role+of+Fecal+Calprotectin&author=Ojetti,+V.&author=Saviano,+A.&author=Covino,+M.&author=Acampora,+N.&author=Troiani,+E.&author=Franceschi,+F.&author=Abbate,+V.&author=Acampora,+N.&author=Addolorato,+G.&author=Agostini,+F.&publication_year=2020&journal=Dig.+Liver+Dis.&volume=52&pages=1231–1233&doi=10.1016/j.dld.2020.09.015