Berger Jeffrey S, Goldstein Michael, Dangerfield Paul, Perry Jonathan, Boyd Kendra N
Department of Anesthesiology, The George Washington University Medical Center, 900 23rd St., NW Suite G-2092, Washington, DC 20037, USA.
Anesth Analg. 2011 Sep;113(3):473-5. doi: 10.1213/ANE.0b013e3182135a1f. Epub 2011 Mar 3.