1. Department of Pain, The 1st People's Hospital of Chenzhou City, Nanhua University, Hunan, Chenzhou, China
2. State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-Sen University, Guangzhou, People’s Republic of China
3. Department of Ophthalmology, Hunan General Hospital, Changsha, People’s Republic of China
4. Department of Ophthalmology, Guangdong Eye Institute, Guangdong General Hospital, Guangdong Academy of Medical Sciences, Guangzhou, People’s Republic of China