1. Diakonissenhospital Flensburg Medical Clinic Flensburg Germany
2. Medical Care Center Kempten‐Allgäu Kempten Germany
3. Department of GastroenterologyInfectiology and Rheumatology—Universitätsmedizin Berlin Berlin Germany
4. Cardiovascular Center Oberallgäu‐Kempten Kempten Germany