[1] Rhein Westfal TH Aachen, Med Fac, Dept Anaesthesiol, Aachen, Germany
[2] Klinikverbund St Antonius & St Josef GmbH, Dept Anaesthesiol Intens Care & Pain Therapy, Wuppertal, Germany
[3] Hannover Med Sch, Dept Anaesthesiol & Intens Care, Hannover, Germany
[4] Charite Ctr Neurol Neurosurg & Psychiat, Psychiat & Affect Neurosci, Campus Benjamin Franklin, Berlin, Germany
[5] Rhein Westfal TH Aachen, Med Fac, Dept Geriatr Med, Aachen, Germany
[6] Univ Munster, Inst Biostat & Clin Res, Munster, Germany
[7] Univ Hosp Essen, Dept Geriatr, Essen, Germany
[8] Ludwig Maximilians Univ Munchen, Dept Anaesthesiol, Munich, Germany
[9] Univ Hosp Magdeburg, Dept Anaesthesiol & Intens Care, Magdeburg, Germany
[10] Ruhr Univ Bochum, Klinikum Herford, Dept Anaesthesiol Surg Intens Care Emerge, Herford, Germany
[11] Rhein Westfal TH Aachen, Med Fac, Dept Orthopaed Trauma Surg, Aachen, Germany
[12] Rhein Westfal TH Aachen, Med Fac, Dept Med Stat, Aachen, Germany
[13] Univ Hosp Bonn, Dept Anaesthesiol & Operat Intens Care Med, Bonn, Germany
[14] Rhein Westfal TH Aachen, Med Fac, Ctr Translat & Clin Res Aachen CTC A, Aachen, Germany
[15] Univ Hosp Dusseldorf, Dept Anaesthesiol, Dusseldorf, Germany
[16] Gemeinschaftskrankenhaus Bonn, Dept Anaesthesiol, Bonn, Germany
[17] Univ Hosp Wurzburg, Dept Anaesthesiol, Wurzburg, Germany
[18] Johannes Gutenberg Univ Mainz, Dept Anaesthesiol, Univ Med Ctr, Mainz, Germany
[19] Univ Hosp Schleswig Holstein, Dept Anaesthesiol & Intens Care, Lubeck, Germany
[20] Univ Penn, Dept Anaesthesiol & Crit Care, Philadelphia, PA USA
[21] Univ Hosp Hamburg Eppendorf, Dept Geriatr Anaesthesiol, Hamburg, Germany
[22] Reutlingen Hosp GMBH, Dept Anaesthesiol & Intens Care, Reutlingen, Germany
[23] Univ Wisconsin, Dept Anesthesiol, Madison, WI USA
[24] Rhein Westfal TH Aachen, Med Fac, Dept Psychiat Psychotherapy & Psychosomat, Stuttgart, Germany
[25] Rhein Westfal TH Aachen, Med Fac, Dept Psychiat Psychotherapy & Psychosomat, Aachen, Germany
[26] Res Ctr Julich, INM 10, Julich, Germany
[27] Aktionsbundnis Patientensicherheit eV, Berlin, Germany
[28] Med Advisory Serv Social Hlth Insurance, Sect Patient Safety, Essen, Germany
[29] Charite Univ Med Berlin, Dept Anaesthesiol, Berlin, Germany
[30] Univ Hosp Dresden, Dept Anaesthesiol & Intens Care, Dresden, Germany
[31] Univ Witten Herdecke, Dept Anaesthesiol & Operat Intens Care, Witten, Germany
[32] Univ Hosp Bonn, Dept Orthopaed & Trauma Surg, Bonn, Germany
[33] Univ Hosp Frankfurt, Dept Anaesthesiol Intens Care & Pain Therapy, Frankfurt, Germany
[34] Univ Hosp Muenster, Dept Anaesthesiol Intens Care & Pain Therapy, Munster, Germany
[35] Marienhosp Stuttgart, Dept Anaesthesiol Intens Care & Pain Therapy, Stuttgart, Germany