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John Butterworth Author

John Butterworth, MD, is former professor and chairman of the Department of Anesthesiology at Virginia Commonwealth University in Richmond, VA.

David C. Mackey, MD, is professor of Anesthesiology and Perioperative Medicine at the University of Texas MD Anderson Cancer Center in Houston, TX.

John Wasnick, MD, is chairman of the Department of Anesthesiology at Texas Tech University Health Sciences School of Medicine in Lubbock, TX.