Funding for this research was provided by:
National Natural Science Foundation of China (81741039, 81770236)
Text and Data Mining valid from 2019-11-14
Received: 15 March 2019
Accepted: 25 October 2019
First Online: 14 November 2019
Ethics approval and consent to participate
: The study was approved by the Ethics Committee of Women’s Hospital of Nanjing Medical University in China. Written informed consent to participate was obtained for all participants or their guardians.
: The patients or their guardians consented to the publication of medical data and genetic data. Written informed consent was obtained from the patients or their guardians.
: The authors declare that they have no competing interests.