1 First Department of Critical Care Medicine and Pulmonary Services, Evangelismos Hospital-Medical School of National and Kapodistrian University of Athens, 45-47 Ipsilantou St, 106 76, Athens, Greece. Vrettou@hotmail.com.
2 Department of Clinical Therapeutics, Alexandra Hospital-Medical School of Athens, 80 Vass. Sofias Av., 115 28, Athens, Greece.
3 Division of Brain Sciences, Charing Cross Hospital-Imperial College London, Fulham Palace Road, London, W6 8RF, UK.
4 First Department of Critical Care Medicine and Pulmonary Services, Evangelismos Hospital-Medical School of National and Kapodistrian University of Athens, 45-47 Ipsilantou St, 106 76, Athens, Greece.
5 Second Department of Critical Care Medicine, Attikon Hospital-National and Kapodistrian University of Athens, 1 Rimini St., 124 62, Athens, Greece.
6 Department of Intensive Care, Ygeia Hospital, 4 Erythrou Stavrou and Kifisias Av., 151 25, Athens, Greece.