Funding for this research was provided by:
Beijing Capital Characteristic Clinical Application Research Project from Beijing Municipal Science & Technology Commission of China ((number Z151100004015161))
Received: 11 September 2018
Accepted: 23 January 2019
First Online: 13 February 2019
Ethics approval and consent to participate
: The study protocol has been approved by the Institutional Review Board of the Dongzhimen hospital, affiliated to the Beijing University of Chinese Medicine (No. ECPJ-BDY-2015-69), and has been registered with the Chinese Clinical Trial Registry (ChiCTR-INR-16007686).
: Not applicable.
: The authors declare that they have no competing interests.
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