1 Department of Ophthalmology, Linkou Chang Gung Memorial Hospital, Kwei-Shan, Taoyuan, Taiwan; College of Medicine, Chang Gung University, Kwei-Shan, Taoyuan, Taiwan.
2 Department of Ophthalmology, Linkou Chang Gung Memorial Hospital, Kwei-Shan, Taoyuan, Taiwan; College of Medicine, Chang Gung University, Kwei-Shan, Taoyuan, Taiwan; Department of Ophthalmology, Tucheng Municipal Hospital, Tucheng, New Taipei, Taiwan.