1 Department of Radiology, The Second Affiliated Hospital of Dalian Medical University, 467 Zhong Shan Road, Dalian, 116023, China.
2 Weifang Nursing Vocational College, China.
3 Department of Radiology, The Second Affiliated Hospital of Dalian Medical University, 467 Zhong Shan Road, Dalian, 116023, China. Electronic address: Drzxkong@163.com.