title: Response.
authors.affiliation: Department of Internal Medicine, Division of Pulmonary, Allergy, and Critical Care Medicine, Duke University, Durham, NC. Electronic address: momen.wahidi@duke.edu.
authors.forename: Momen M
authors.initials: MM
authors.lastname: Wahidi
authors.affiliation: CHEST, Glenview, IL.
authors.forename: Sheena
authors.initials: S
authors.lastname: Patel