1 Faculty of Medicine, University of Zurich, Zurich, Switzerland.
2 Department of Anesthesia, Beilinson Hospital, Petach Tikvah, Israel; Affiliated with Saklar Medical School, Tel Aviv University.
3 Department of Psychiatry, Sunnybrook Health Sciences Centre, University of Toronto, FG 44, Psychiatry, 2075 Bayview Avenue, Toronto, Ontario M4N 3M5, Canada.
4 Department of Anesthesia, Sunnybrook Health Sciences Centre, University of Toronto, 63 Elm Ridge Drive, Toronto, Ontario M6B 1A2, Canada.
5 Department of Anesthesia, Beilinson Hospital, Petach Tikvah, Israel; Affiliated with Saklar Medical School, Tel Aviv University. Electronic address: leidelman@clalit.org.il.