1. The Medical Eye Center, Manchester, New Hampshire, USA
2. Departments of Ophthalmology and Neurology, Mayo Clinic, Rochester, Minnesota, USA
3. Department of Ophthalmology, Taipei Veterans General Hospital, Taipei, Taiwan. Department of Ophthalmology, School of Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan
4. Department of Neurology, Mahidol University, Thailand
5. Department of Ophthalmology, Illinois Ear and Eye Infirmary, Chicago, Illinois, USA
6. Department of Ophthalmology, University of Minnesota, Minneapolis, Minnesota, USA
7. Departments of Ophthalmology, Neurology, and Neurosurgery, UAB Callahan Eye Hospital, Birmingham, AL, USA
8. Department of Neurology, Ohio State University Medical Center, Ohio, USA. Department of Neurology, Beijing Tongren Hospital, Capital Medical University, Beijing, China