Funding for this research was provided by:
National Natural Science Foundation of China (81671688)
Shanghai Jiao Tong University (YG2017QN56)
Received: 14 July 2019
Accepted: 14 November 2019
First Online: 6 December 2019
Ethics approval and consent to participate
: Institutional Review Board of Rui Jin Hospital and written informed consent was acquired from patients before the US examination.
: Not applicable.
: The authors declare that they have no competing interests.