Funding for this research was provided by:
Shanghai Municipal Shenkang Hospital Development Center (SHDC22015013)
Text and Data Mining valid from 2018-05-22
Received: 15 December 2017
Accepted: 9 May 2018
First Online: 22 May 2018
Ethics approval and consent to participate
: All patients had written the informed consent in which the purpose about this study, the technical information about the ultrasound examination, the research process and the right of the participants were described clearly. They had been given the opportunity to ask questions about this study, and they had been answered to their satisfaction. All 152 patients consented to participate in this study.The ethical implications of this study were adequately described in the application for approval of research protocol. This study was approved by the Fudan University Research Ethics Committee.
: We declared that written informed consents and any ultrasonic images were obtained from the patients for publication of this study.
: The authors declare that they have no competing interests
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.