[1] Yantai Zhengda Guangming Eye Hosp, Dept Ophthalmol, Zhengda Guangming Eye Grp, Yantai, Shandong, Peoples R China
[2] Qingdao Univ, Zhengda Guangming Int Eye Res Ctr, Qingdao, Peoples R China
[3] Yantai Yuhuangding Hosp, Dept Nursing, Yantai, Shandong, Peoples R China