1. From the Department of Pediatrics (J.F., E.B., M.H.H.), Department of Genetics (J.F., M.J.B., M.C.C., E.F.T., A.M., J.A.M.D., J.M., L.F., C.W., A.Z.), and Department of Gastroenterology and Hepatology (F.I., R.K.W.), University of Groningen, University Medical Center Groningen, Groningen, The Netherlands; Top Institute Food and Nutrition, Wageningen, The Netherlands (E.F.T., J.A.M.D., A.Z.); Department of Immunology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University,...