Gitnick, G Etiology of inflammatory bowel diseases: where have we been? Where are we going? [electronic resource] - Scandinavian journal of gastroenterology. Supplement 1990 - 93-6 p. digital Publication Type: Journal Article; Review ISSN: 0085-5928 Standard No.: 10.3109/00365529009093132 doi Subjects--Topical Terms: Colitis, Ulcerative--etiologyCrohn Disease--etiologyHumansIntestines--microbiology