Olbjern, C. Smastuen, M.C. Thiis-Evensen, E. Nakstad, B. Vatn, M.H. Jahnsen, J. Ricanek, P. Vatn, S. Moen, A.E.F. Tannaes, T.M. Lindstrom, J.C. Soderholm, J.D. Halfvarson, J. Gomollon, F. Casen, C. Karlsson, M.K. Kalla, R. Adams, A.T. Satsangi, J. Perminow, G. Fecal microbiota profiles in treatment-naive pediatric inflammatory bowel disease - associations with disease phenotype, treatment, and outcome Clin. exp. gastroenterol. 10.2147/CEG.S186235 2019 2019