Funding for this research was provided by:
Shanghai Shen Kang Hospital Development Center ”Comprehensive prevention and control project of chronic disease in municipal hospital” ,2015,Shanghai,China. (SHDC 12015312)
Article History
Received: 18 February 2018
Accepted: 22 August 2018
First Online: 30 August 2018
Compliance with ethical standards
:
: The authors have no conflicts of interest to declare.
: This study was approved by the institutional Ethics Committee of International Peace Maternal and Child Health Hospital. The date of approval is 2/8/2016 and the reference number is (GKLW) 2015–28. All study participants gave written informed consent.