1 Department of Anaesthesia and Intensive Medicine, 1st Medical Faculty, Charles University in Prague and General University Hospital, Ulice Nemocnice 2, 120 21 Prague, Czech Republic; Norwich Research Park, University of East Anglia, Norwich, Norfolk NR4 7TJ, UK.
2 Department of Anesthesia, University of Iowa Hospitals and Clinics, Iowa City, IA 52242-1009, USA.
3 Department of Anesthesiology and Reanimation, Medical Faculty, Kocaeli University, Umuttepe, 413 80 Kocaeli, Turkey.
4 Department of Anaesthetics, Antrim Area Hospital, Bush Road, Antrim BT41 4RD, UK.
5 Department of Anesthesiology, Tokyo Women's Medical University, Shinjuku-ku, Tokyo 162-8666, Japan.