Li, Zhe
Liu, Tie
Yin, Peng
Wang, Yu
Liao, Shengen
Zhang, Shuo
Su, Qingjun http://orcid.org/0000-0001-9563-138X
Hai, Yong
Funding for this research was provided by:
Beijing Municipal Bureau of Health (2016-4-2033)
Beijing Municipal Science and Technology Commission (SCW2016-29)
Article History
Received: 22 January 2018
Accepted: 28 May 2018
First Online: 16 July 2018
Compliance with ethical standards
:
: The authors declare that they have no conflicts of interest.
: This study was approved by our Institutional Review Board in compliance with the Helsinki Declaration.
: Written consent was obtained from all the subjects prior to participation in this study.