Funding for this research was provided by:
National Key R & D Program of China (2016YFC20160905200)
National Natural Science Foundation of China (81570895)
National Natural Science Foundation of China (81420108009)
National Natural Science Foundation of China (81400444)
National Natural Science Foundation of China (81470678)
National Natural Science Foundation of China (81630023)
Changjiang scholars and innovative research team (IRT13082)
special fund of capital health development (2011-1017-06)
special fund of capital health development (2011-1017-02)
special fund of sanitation elite reconstruction of Beijing (2009-2-007)
Beijing health bureau program for high level talents (2011-3-043)
Beijing Municipal Administration of Hospitals’ Mission Plan (SML20150203)
Capital citizenry health program (z161100000116062)
Article History
Received: 11 May 2018
Accepted: 11 September 2018
First Online: 21 November 2018