Affiliation: | 1. German Hodgkin Study Group and Internal Medicine I, University Hospital Cologne, Cologne;2. Internal Medicine, University Hospital Wuerzburg, Wuerzburg;3. Internal Medicine III, Hospital Chemnitz, Chemnitz;4. Internal Medicine, Stiftungsklinikum Mittelrhein Koblenz, Koblenz, Germany. E‐mail: Peter.Borchmann@uni‐koeln.de |