1. Department of Ophthalmology, Dong-A University College of Medicine, Busan, Korea.
2. Department of Neurology, Hangang Sacred Heart Hospital, Hallym University College of Medicine, Seoul, Korea.
3. Department of Neurology, Dong-A University College of Medicine, Busan, Korea.
4. Peripheral Neuropathy Research Center, Dong-A University College of Medicine, Busan, Korea.
5. Department of Molecular Neuroscience, Dong-A University College of Medicine, Busan, Korea.
6. Department of Neurology, Kangdong Sacred Heart Hospital, Hallym University College of Medicine, Seoul, Korea.