Zhu, Yuanchang
Wu, Tonghua
Ye, Lijun
Li, Guangui
Zeng, Yong
Zhang, Yaou
Funding for this research was provided by:
National Natural Science Foundation of China (No.31371315, 2014; No.81601279, 2016)
International Cooperation Grant of Shenzhen (No. GJHZ20140416153718941, 2014)
Article History
Received: 19 January 2018
Accepted: 9 May 2018
First Online: 21 May 2018
Compliance with ethical standards
:
: The research project met our ethics criteria and was approved and performed strictly according to the protocols. Informed consent was obtained from all couples prior to the study.
: The ethical committee reviewed the manuscript and consent for publication.
: The authors declare that they have no conflicts of interest.