1. Department of Colorectal and Anal Surgery, The First Hospital of Jilin University, Changchun, Jilin, People’s Republic of China
2. Department of Endoscopy Center, China-Japan Union Hospital of JiLin University, Changchun, Jilin, P.R.China
3. Department of Thoracic Oncology, Tumor Hospital of Jilin Province, Changchun, Jilin People’s Republic of China
4. Department of Ophthalmology, The China-Japan Union Hostial of Jilin University, Jilin University, Changchun, Jilin, P.R. China