title: Reply to Matelot, Schnell, Kervio, Thillaye du Boullay, and Carre.
authors.forename: Mark R
authors.initials: MR
authors.lastname: Boyett
authors.forename: Alicia
authors.initials: A
authors.lastname: D'Souza
authors.forename: Henggui
authors.initials: H
authors.lastname: Zhang
authors.forename: Gwilym M
authors.initials: GM
authors.lastname: Morris
authors.forename: Halina
authors.initials: H
authors.lastname: Dobrzynski
authors.forename: Oliver
authors.initials: O
authors.lastname: Monfredi
mesh_terms: D000818:Animals; D056352:Athletes; D001919:Bradycardia / Q000209:etiology* / Q000503:physiopathology*; D005260:Female; D006801:Humans; D008297:Male; D012849:Sinoatrial Node / Q000502:physiology*; D013177:Sports / Q000502:physiology*; D014630:Vagus Nerve / Q000502:physiology*