- Correspondence to Professor T-L Chen, Department of Anaesthesiology, Taipei Medical University Hospital, affiliated with School of Medicine, College of Medicine, Taipei Medical University, 250 Wuxing St, Taipei 11031, Taiwan;
- Received January 22, 2012
- Revised May 28, 2012
- Accepted June 13, 2012
- First published July 8, 2012.
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