Response

Affiliations

• ¹ Pulmonary and Critical Care Medicine, Veterans Affairs Medical Center, Washington, DC; Pulmonary, Critical Care, and Sleep Disorders Medicine, George Washington University, Washington, DC. Electronic address: huimin.wu@va.gov.
• ² Pulmonary and Critical Care, Johns Hopkins University School of Medicine, Baltimore, MD.
• ³ Pulmonary and Critical Care Medicine, Veterans Affairs Medical Center, Washington, DC; Pulmonary, Critical Care, and Sleep Disorders Medicine, George Washington University, Washington, DC.