- Correspondence to Dr Pei-Chun Chen, Graduate Institute of Epidemiology and Preventive Medicine, National Taiwan University College of Public Health, Taipei 100, Taiwan; , Dr I-Jong Wang, Department of Ophthalmology, National Taiwan University Hospital, 7, Chung-Shan South Road, Taipei 100, Taiwan;
- Accepted August 18, 2012
- First published September 8, 2012.
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