Funding for this research was provided by:
Guangzhou Zhongyi Pharmaceutical Co Ltd
Received: 30 May 2017
Accepted: 18 April 2018
First Online: 27 April 2018
Ethics approval and consent to participate
: All procedures performed in this research involving human participants were in accordance with the ethical standards of Peking University and have been performed in accordance with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. Informed consent was obtained from all patients included in the study. Participants can withdraw at any time without any consequences.
: The authors declare that they have no competing interests.
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