title: Reply.
authors.affiliation: Department of Medicine, Division of Gastroenterology and Hepatology, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, Massachusetts.
authors.forename: John Mark B
authors.initials: JMB
authors.lastname: Gubatan
authors.affiliation: Department of Medicine, Division of Gastroenterology and Hepatology, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, Massachusetts.
authors.forename: Alan C
authors.initials: AC
authors.lastname: Moss
mesh_terms: D002908:Chronic Disease; D003093:Colitis, Ulcerative; D006801:Humans; D012008:Recurrence; D014807:Vitamin D
chemical_list: D014807:Vitamin D