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Lill Bergenzaun*, Hans Öhlin, Petri Gudmundsson, Joachim Düring, Ronnie Willenheimer and Michelle S Chew
* Corresponding author: Lill Bergenzaun lill.bergenzaun@skane.se
BMC Anesthesiology 2012, 12:25 doi:10.1186/1471-2253-12-25