[1] Ctr Eye & Vis Res CEVR, 17W Hong Kong Sci Pk, Hong Kong, Peoples R China
[2] Nankai Univ, Sch Med, Tianjin 300071, Peoples R China
[3] Hong Kong Polytech Univ, Ctr Myopia Res, Sch Optometry, Hong Kong, Peoples R China
[4] Univ Waterloo, Sch Optometry & Vis Sci, Waterloo, ON N2L 3G1, Canada