From the *Department of Anesthesiology and Critical Care, VA Boston Healthcare System and Massachusetts General Hospital, Harvard Medical School; †Department of Anesthesia and Critical Care, Beth Israel Deaconess Medical Center, Harvard Medical School; ‡Department of Cardiology, VA Boston Healthcare System and Boston University Medical Center; §Department of Anesthesiology, Boston University Medical Center, Boston University School of Medicine; Boston, Massachusetts.
This article has supplementary material on the Web site: www.anesthesia-analgesia.org.
Accepted for publication April 9, 2008.
Address for correspondence and reprint requests to Kay B. Leissner, MD, PhD, Anesthesiology Service, VA Boston Healthcare Service, 1400 VFW Parkway, Boston, MA 02132. Address e-mail to email@example.com.