title: Reply.
authors.affiliation: University of Utah, Salt Lake City, Utah USA (N.C.K.)Stanford University School of Medicine, Palo Alto, California USA (G.S.L., S.R.W.)Tacoma General Hospital, Tacoma, Washington USA (B.B.C.)University of Hawaii, Honolulu, Hawaii USA (P.S.H.)Royal Perth Hospital, Perth, Western Australia, Australia (J.F.P.).
authors.forename: Nicholas C
authors.initials: NC
authors.lastname: Kanaan
authors.affiliation: University of Utah, Salt Lake City, Utah USA (N.C.K.)Stanford University School of Medicine, Palo Alto, California USA (G.S.L., S.R.W.)Tacoma General Hospital, Tacoma, Washington USA (B.B.C.)University of Hawaii, Honolulu, Hawaii USA (P.S.H.)Royal Perth Hospital, Perth, Western Australia, Australia (J.F.P.).
authors.forename: Grant S
authors.initials: GS
authors.lastname: Lipman
authors.affiliation: University of Utah, Salt Lake City, Utah USA (N.C.K.)Stanford University School of Medicine, Palo Alto, California USA (G.S.L., S.R.W.)Tacoma General Hospital, Tacoma, Washington USA (B.B.C.)University of Hawaii, Honolulu, Hawaii USA (P.S.H.)Royal Perth Hospital, Perth, Western Australia, Australia (J.F.P.).
authors.forename: Benjamin B
authors.initials: BB
authors.lastname: Constance
authors.affiliation: University of Utah, Salt Lake City, Utah USA (N.C.K.)Stanford University School of Medicine, Palo Alto, California USA (G.S.L., S.R.W.)Tacoma General Hospital, Tacoma, Washington USA (B.B.C.)University of Hawaii, Honolulu, Hawaii USA (P.S.H.)Royal Perth Hospital, Perth, Western Australia, Australia (J.F.P.).
authors.forename: Peter S
authors.initials: PS
authors.lastname: Holck
authors.affiliation: University of Utah, Salt Lake City, Utah USA (N.C.K.)Stanford University School of Medicine, Palo Alto, California USA (G.S.L., S.R.W.)Tacoma General Hospital, Tacoma, Washington USA (B.B.C.)University of Hawaii, Honolulu, Hawaii USA (P.S.H.)Royal Perth Hospital, Perth, Western Australia, Australia (J.F.P.).
authors.forename: James F
authors.initials: JF
authors.lastname: Preuss
authors.forename: Sarah R
authors.initials: SR
authors.lastname: Williams
mesh_terms: D000532:Altitude Sickness / Q000000981:diagnostic imaging* / Q000453:epidemiology*; D005260:Female; D006801:Humans; D008297:Male; D009798:Ocular Hypertension / Q000000981:diagnostic imaging* / Q000453:epidemiology*; D009900:Optic Nerve / Q000000981:diagnostic imaging*; D014463:Ultrasonography / Q000706:statistics & numerical data*