- Correspondence to: Dr Y Hirabayashi Department of Anesthesiology and Critical Care Medicine, Jichi Medical University, 3311-1 Yakushiji, Shimotsuke-shi, Tochigi 329-0498, Japan;
- Accepted 14 January 2007
- Published in print 1 May 2007.
- Published online 23 April 2007.
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