1. Department of Ophthalmology, The Affiliated Yantai Yuhuangding Hospital of Medical College, Qingdao University, China
2. Department of Physical Examination, The Affiliated Yantai Yuhuangding Hospital of Medical College, Qingdao University, China
3. Department of Ophthalmology, Laiyang Central Hospital, China
4. Depertment of Ophthalmology, Linyi People’s Hospital, China