[1] Stellenbosch Univ, Fac Med & Hlth Sci, Div Ophthalmol, Cape Town, South Africa
[2] Istanbul Univ, Dept Ophthalmol, Istanbul, Turkiye
[3] Bayrampasa Eye Hosp, Eye Protect Fdn, Eye Dept, Istanbul, Turkiye
[4] Johns Hopkins Univ, Sch Med, Dept Ophthalmol, Baltimore, MD USA
[5] Johns Hopkins Univ, Bloomberg Sch Publ Hlth, Dept Epidemiol, Baltimore, MD USA