1. Department of GastroenterologyHepatology and Infectious DiseasesOtto‐von‐Guericke University Magdeburg 39120 Germany
2. Institute of Human GeneticsOtto‐von‐Guericke University Magdeburg 39120 Germany
3. Department of Gastroenterology and Institute for Digestive ResearchLithuanian University of Health Sciences Kaunas 50161 Lithuania