[1
]
Department of Ophthalmology, National Taiwan University Hospital, College of Medicine,
National Taiwan University, Taipei, Taiwan.
[2
]
Institute of Epidemiology and Preventive Medicine, College of Public Health, National
Taiwan University, Taipei, Taiwan.
[3
]
Department of Ophthalmology, National Taiwan University Hospital, College of Medicine,
National Taiwan University, Taipei, Taiwan. Electronic address: ijong@ms8.hinet.net.