[1] Chinese Univ Hong Kong, Dept Ophthalmol & Visual Sci, Hong Kong, Hong Kong, Peoples R China
[2] Prince Wales Hosp, Hong Kong, Hong Kong, Peoples R China
[3] Alice Ho Miu Ling Nethersole Hosp, Hong Kong, Hong Kong, Peoples R China
[4] Hong Kong Eye Hosp, Hong Kong, Hong Kong, Peoples R China