From the Center for Surgical Trials and Outcomes Research and Division of Acute Care Surgery, Johns Hopkins School of Medicine, Baltimore, MD.
Address for reprints: Adil H. Haider, MD, MPH, Center for Surgical Trials and Outcomes Research, Department of Surgery, Johns Hopkins School of Medicine, 1800 Orleans St, 6107 Sheikh Zayed Tower, Baltimore, MD 21287; email: [email protected].