1 Department of General Practice, The First Affiliated Hospital of China Medical University, No. 155 Nanjing North Street, Heping District, Shenyang, 110001, China.
2 Department of the Fourth General Surgery, The Fourth Affiliated Hospital of China Medical University, No. 4 Chongshan East Road, Huanggu District, Shenyang, 110032, China.
3 Department of the Science and Experiment Center, The China Medical University, No. 77 Puhe Road, Shenbei New Area, Shenyang, 110122, China.
4 Department of General Practice, The First Affiliated Hospital of China Medical University, No. 155 Nanjing North Street, Heping District, Shenyang, 110001, China. utmqra@163.com.