[1] Department of Anesthesiology,
[2] Academic Medical Center,undefined
[3] University of Amsterdam,undefined
[4] The Netherlands,undefined
[5] Laboratory of Experimental Anesthesiology,undefined
[6] Academic Medical Center,undefined
[7] University of Amsterdam,undefined
[8] Meibergdreef 9,undefined
[9] 1105 AZ Amsterdam,undefined
[10] The Netherlands email: m.siegemund@amc.uva.nl Tel.: + 31 (20) 5664820,undefined
[11] Fax: + 31 (20) 6 97 90 04,undefined