1. Department of Ophthalmology, The First Affiliated Hospital of Jinzhou Medical University, Jinzhou, Liaoning 121000, P.R. China
2. Department of Otorhinolaryngology, The Central Hospital of Jinzhou, Jinzhou, Liaoning 121000, P.R. China
3. Department of Ophthalmology, The First Affiliated Hospital of China Medical University, Shenyang, Liaoning 110000, P.R. China