1. Department of Surgery, Shengjing Hospital of China Medical University, Shenyang, Liaoning 110000, P.R. China
2. Department of Oncology, Shengjing Hospital of China Medical University, Shenyang, Liaoning 110000, P.R. China
3. Department of Pediatric Intensive Care Medicine, Shengjing Hospital of China Medical University, Shenyang, Liaoning 110000, P.R. China
4. Department of Ultrasonography, Shengjing Hospital of China Medical University, Shenyang, Liaoning 110000, P.R. China
5. Department of Medical Administration, Shengjing Hospital of China Medical University, Shenyang, Liaoning 110000, P.R. China