1 First Department of Intensive Care Medicine, University of Athens Medical School, Evaggelismos General Hospital, Athens, Greece. Electronic address: sdmentzelopoulos@yahoo.com.
2 University of Antwerp, Belgium; European Resuscitation Council, Niel, Belgium.
3 Department of Anaesthesiology and Pain Medicine, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland; School of Medicine, Sigmund Freud University Vienna, Vienna, Austria.