Funding for this research was provided by:
Science and Technology Major Project (2017SK1030)
Hunan Provincial Nature Science Foundation (2017SK4006)
Received: 11 November 2019
Accepted: 15 January 2020
First Online: 11 February 2020
Ethics approval and consent to participate
: All processes and care for the patients followed the Helsinki Declaration and both patients provided written, informed consent to participate in all tests and procedures according to the Ethics Committee at the Maternal and Child Hospital of Hunan Province.
: Both patients provided written, informed consent to the publication of their innominate details.
: The authors declare that they have no competing interests.