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Article History

Received: 19 March 2020

Accepted: 28 July 2020

First Online: 1 September 2020

Compliance with ethical standards

:

: The authors declare that they have no conflict of interest.

: This work was supported by the approval of Ethics Committee of Fujian Maternity and Child Health Hospital. All the participants signed the informed consents before the study.

: Research data have been included in this manuscript and supplementary information files.