There are errors in the author affiliations. The publisher apologizes for the error. The correct affiliations are as follows:

Carsten Hermes¹ Peter Nydahl², Manfred Blobner³, Rolf Dubb⁴, Silke Filipovic⁵, Arnold Kaltwasser⁶, Bernhard Ulm³, Stefan J. Schaller^3,7

1 CCRN, Bonn, Germany, 2 Nursing Research, Department of Anesthesiology and Intensive Care Medicine, University Hospital of Schleswig-Holstein, Kiel, Germany, 3 Department of Anesthesiology and Intensive Care, Klinikum rechts der Isar, School of Medicine, Technical University of Munich, Munich, Germany, 4 Academy of District Clinics Reutlingen, Reutlingen, Germany, 5 Department of Physiotherapy, University Hospital of Giessen and Marburg, Marburg, Germany, 6 Academy of District Clinics Reutlingen, Reutlingen, Germany, 7 Department of Anesthesiology and Operative Intensive Care Medicine, Charité –Universitätsmedizin Berlin, Berlin, Germany

There are duplicates in the references section. References 7 refers to the same source as reference 12, and reference 8 refers to the same source as reference 31.