title: Reply.
authors.affiliation: Columbia College of Physicians and Surgeons, New York-Presbyterian Hospital, New York, New York.
authors.forename: Cara
authors.initials: C
authors.lastname: Agerstrand
authors.affiliation: Columbia College of Physicians and Surgeons, New York-Presbyterian Hospital, New York, New York. Electronic address: hdb5@cumc.columbia.edu.
authors.forename: Daniel
authors.initials: D
authors.lastname: Brodie
authors.affiliation: Columbia College of Physicians and Surgeons, New York-Presbyterian Hospital, New York, New York.
authors.forename: Matthew
authors.initials: M
authors.lastname: Bacchetta