1. Department of Ophthalmology, Pusan National University Yangsan Hospital, Pusan National University School of Medicine, Yangsan, Korea.
2. Department of Parasitology, Pusan National University School of Medicine, Yangsan, Korea.
3. Department of Optometry, Busan Women's College, Busan, Korea.
4. Research Institute for Convergence of Biomedical Science and Technology, Pusan National University Yangsan Hospital, Pusan National University School of Medicine, Yangsan, Korea.