Funding for this research was provided by:
Scientific research project of Shanghai Municipal Commission of Health and Family Planning (201840159)
Shanghai Jing an district health research project (2018QN03)
Received: 21 March 2019
Accepted: 23 September 2019
First Online: 16 January 2020
Ethics approval and consent to participate
: This study was approved by the Institutional Review Board of Shanghai Jing’an District Zhabei Central Hospital and was conducted according to the Ethical Guidelines for Human Genome/Gene Research issued by the Chinese Government. All participants provided written informed consents before enrollment.
: Not applicable.
: The authors declare that they have no competing interests.