1. Department of Ultrasound, the Second Affiliated Hospital of Kunming Medical University, Kunming, China.
2. Department of Radiology, the Second Affiliated Hospital of Kunming Medical University, Kunming, China.
3. Department of Surgery, Kunming Medical University, Kunming, China.
4. Department of Radiology, the Third Affiliated Hospital of Kunming Medical University, Kunming, China.
5. Institute of Medical Biology, Chinese Academy of Medical Sciences, Kunming, China.