Text and Data Mining valid from 2019-08-30
Received: 26 June 2019
Accepted: 30 July 2019
First Online: 30 August 2019
Ethics approval and consent to participate
: This study was performed with the approval of Medical Ethics Committee of Guangdong Women and Children Hospital (Study#201901115).
: All patients in this report provided their consent for publication.
: The authors declare that they have no competing interests.