Funding for this research was provided by:
the National Natural Science Foundation of China (81771539 & 81971346)
Nanjing Medical Science and Technique Development Foundation (ZKX17033 and YKK18127)
the Natural Science Foundation of Jiangsu Province (BK20190134)
Received: 11 May 2019
Accepted: 26 December 2019
First Online: 15 January 2020
Ethics approval and consent to participate
: This study was approved by the Ethics committee of Jiangsu Key Laboratory of Molecular Medicine, Medical School, Nanjing University. The patients and health women provided verbal informed consent and volunteered to participate in the study.The ethics committee approved this form of consent. Every patient need the blood test when she came to the hospital. We just got 1 ml blood sample while they were undergoing the clinical examinations and performed the genotype test. We don’t give any additional interventions for the patients.
: Not applicable.
: The authors declare that they have no competing interests.