title: Authors' reply.
authors.affiliation: *School of Kinesiology, University of British Columbia, Vancouver, British Columbia, Canada †Department of Family Practice, University of British Columbia, Vancouver, British Columbia, Canada ‡Division of Emergency Medicine, Department of Medicine, University of Toronto, Toronto, Ontario, Canada §SHSC Emergency Department, Toronto, Ontario, Canada ¶Canadian Sport Institute Pacific-Vancouver Campus, Vancouver, British Columbia, Canada.
authors.forename: Michael S
authors.initials: MS
authors.lastname: Koehle
authors.forename: Ivy
authors.initials: I
authors.lastname: Cheng
authors.forename: Benjamin
authors.initials: B
authors.lastname: Sporer
mesh_terms: D000064:Acclimatization / Q000502:physiology*; D000531:Altitude; D000532:Altitude Sickness / Q000517:prevention & control*; D054874:Athletic Performance / Q000502:physiology*; D006801:Humans; D064797:Physical Conditioning, Human / Q000502:physiology*; D013178:Sports Medicine / Q000379:methods*