1. Affiliated Eye Hospital, Shandong University of Traditional Chinese Medicine, Jinan, Shandong 250002, P.R. China
2. College of Ophthalmology and Optometry, Shandong Provincial Key Laboratory of Integrated Traditional Chinese and Western Medicine for Prevention and Therapy of Ocular Diseases, Shandong Academy of Eye Disease Prevention and Therapy, Jinan, Shandong 250002, P.R. China