Fecal microbiota profiles in treatment-naïve pediatric inflammatory bowel disease – associations with disease phenotype, treatment, and outcome 由 Olbjørn, C, Småstuen, MC, Thiis-Evensen, E, Nakstad, B, Vatn, MH, Jahnsen, J, Ricanek, P, Vatn, S, Moen, AEF, Tannæs, TM, Lindstrøm, JC, Söderholm, JD, Halfvarson, J, Gomollón, F, Casén, C, Karlsson, MK, Kalla, R, Adams, AT, Satsangi, J, Perminow, G