title: Reply: To PMID 23083785.
authors.forename: Keri M
authors.initials: KM
authors.lastname: Shafer
authors.forename: Jorge A
authors.initials: JA
authors.lastname: Garcia
authors.forename: Tony G
authors.initials: TG
authors.lastname: Babb
authors.forename: David E
authors.initials: DE
authors.lastname: Fixler
authors.forename: Colby R
authors.initials: CR
authors.lastname: Ayers
authors.forename: Benjamin D
authors.initials: BD
authors.lastname: Levine
mesh_terms: D015444:Exercise / Q000502:physiology*; D017079:Exercise Tolerance / Q000502:physiology*; D005260:Female; D018729:Fontan Procedure; D006339:Heart Rate / Q000502:physiology*; D006801:Humans; D008297:Male; D010101:Oxygen Consumption / Q000502:physiology*; D013318:Stroke Volume / Q000502:physiology*