title: In reply.
authors.affiliation: *Wake Forest School of Medicine, Winston-Salem, North Carolina. molympio@wakehealth.edu.
authors.forename: David M
authors.initials: DM
authors.lastname: Seif
authors.forename: Michael A
authors.initials: MA
authors.lastname: Olympio
mesh_terms: D000764:Anesthesia, Closed-Circuit / Q000379:methods*; D045853:Exhalation / Q000502:physiology*; D006801:Humans; D008297:Male; D019300:Medical Errors / Q000009:adverse effects*; D012121:Respiration, Artificial / Q000379:methods*