title: Choroidal thickness in high-altitude sickness.
authors.forename: Wei Kiong
authors.initials: WK
authors.lastname: Ngo
authors.affiliation: National Healthcare Group Eye Institute, Tan Tock Seng Hospital; Fundus Image Reading Center, National Healthcare Group Eye Institute, Singapore.
authors.forename: Colin S H
authors.initials: CS
authors.lastname: Tan