1. Department of Optometry, Chung Hwa University of Medical Technology, Tainan City 71701, Taiwan, R.O.C.
2. Department of Nursing, Tzu Chi University of Science and Technology, Hualien City 97005, Taiwan, R.O.C.
3. Department of Psychosomatic Internal Medicine, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima 890, Japan
4. Graduate Institute of Gerontology and Health Care Management, Chang Gung University of Science and Technology, New Taipei City 11049, Taiwan, R.O.C.
5. Department of Ophthalmology, Chi-Mei Medical Center, Tainan City 71003, Taiwan, R.O.C.
6. Department of Obstetrics and Gynecology, Mackay Memorial Hospital, Taipei City 10449, Taiwan, R.O.C.