title: Reply to Joseph.
authors.affiliation: John Rankin Laboratory of Pulmonary Medicine, University of Wisconsin-Madison, Madison, Wisconsin Morgan@pt.wisc.edu.
authors.forename: Barbara J
authors.initials: BJ
authors.lastname: Morgan
authors.affiliation: John Rankin Laboratory of Pulmonary Medicine, University of Wisconsin-Madison, Madison, Wisconsin.
authors.forename: Russell
authors.initials: R
authors.lastname: Adrian
authors.affiliation: John Rankin Laboratory of Pulmonary Medicine, University of Wisconsin-Madison, Madison, Wisconsin.
authors.forename: Melissa L
authors.initials: ML
authors.lastname: Bates
authors.affiliation: John Rankin Laboratory of Pulmonary Medicine, University of Wisconsin-Madison, Madison, Wisconsin.
authors.forename: John M
authors.initials: JM
authors.lastname: Dopp
authors.affiliation: John Rankin Laboratory of Pulmonary Medicine, University of Wisconsin-Madison, Madison, Wisconsin.
authors.forename: Jerome A
authors.initials: JA
authors.lastname: Dempsey
mesh_terms: D000818:Animals; D000860:Hypoxia / Q000503:physiopathology*; D008297:Male; D010101:Oxygen Consumption / Q000502:physiology*; D012119:Respiration