1. Department of Ultrasound, Hwa Mei Hospital, University of Chinese Academy of Sciences, Xibei Road 41, Ningbo 315010, Zhejiang Province, China.
2. Department of Ultrasound, Hwa Mei Hospital, University of Chinese Academy of Sciences, Xibei Road 41, Ningbo 315010, Zhejiang Province, China.
3. Physical Examination Center, Hwa Mei Hospital, University of Chinese Academy of Sciences, Xibei Road 41, Ningbo 315010, Zhejiang Province, China.