Liu, Wei
Shen, Liang
Wang, Qingwen
Wang, Wei
Sun, Zengtao
Funding for this research was provided by:
Shandong Science and Technology Development Plans. (2014GGH218027)
Shandong Science and Technology Development Plans (2013GSF11907)
Science and Technology Research Projects of the Population and Family Planning Commission of Shandong, China (no. 9 2012)