1. Department of Pathology, The First Affiliated Hospital and College of Basic Medical Sciences, China Medical University, Shenyang, Liaoning, China
2. Department of Neurology, Sheng Jing Hospital of China Medical University, Shenyang, Liaoning, China
3. Department of Pathology, Hebei Petro China Central Hospital, Langfang, Hebei, China
4. Department of Ophthalmology, Jili Hospital of Liuyang (Liuyang Eye Hospital), Changsha, Hunan, China
5. Department of Pathology, Duke University Medical Center, Durham, NC 27710, USA