title: The authors reply.
authors.affiliation: Department of Internal Medicine III, University Hospital Aachen, Aachen, Germany;Department of Internal Medicine III and Interdisciplinary Center for Clinical Research (IZKF), University Hospital Aachen, Aachen, Germany.
authors.forename: Renwar
authors.initials: R
authors.lastname: Nuraldeen
authors.forename: Frank
authors.initials: F
authors.lastname: Tacke
authors.forename: Alexander
authors.initials: A
authors.lastname: Koch
authors.forename: Christian
authors.initials: C
authors.lastname: Trautwein
authors.forename: Pavel
authors.initials: P
authors.lastname: Strnad