Joffe Denise C, Rivo Julia, Oxorn Donald C
Department of Anesthesiology,University of Washington Medical Center, Children's Hospital and Regional Medical Center, 4800 Sand Point Way NE, Seattle, WA 98105, USA.
Anesth Analg. 2008 Oct;107(4):1163-5. doi: 10.1213/ane.0b013e3181806974.