Liang, Haijie
Guo, Wei
Yang, Rongli
Tang, Xiaodong
Yan, Taiqiang
Funding for this research was provided by:
Beijing Science and Technology Program (2144000026)
Public Welfare Industry Scientific Research Program of Ministry of Health (2115000014)
Article History
Received: 1 January 2018
Accepted: 12 February 2018
First Online: 24 February 2018
Compliance with ethical standards
: This study was approved by the institutional review board. Informed consents were obtained from all subjects or guardians.
: The authors declare that they have no conflict of interest.