Authors: W Fischbach; P Malfertheiner; P Lynen Jansen; W Bolten; J Bornschein; S Buderus; E Glocker; J C Hoffmann; S Koletzko; J Labenz; J Mayerle; S Miehlke; J Mössner; U Peitz; C Prinz; M Selgrad; S Suerbaum; M Venerito; M Vieth Journal: Z Gastroenterol Date: 2016-04 Impact factor: 2.000