1. Department of Anaesthesiology University Hospital LMU Munich Germany
2. German Association for Anaesthesiology and Intensive Care Medicine NurembergGermany
3. Edinburgh Delirium Research Group Geriatric Medicine Unit Edinburgh Royal Infirmary of Edinburgh UK
4. Institute of Medical Data Processing, Biometrics and Epidemiology (IBE) Faculty of Medicine LMU Munich Germany
5. Department of Psychiatry and Psychotherapy University Hospital LMU Munich Germany
6. Institute for Anaesthesiology, Heart and Diabetes Center NRW Ruhr University of Bochum Bad Oeynhausen Germany