Funding for this research was provided by:
National Natural Science Foundation of China (81500988)
National Key R&D Program of China (2016YFC1300800)
Article History
Received: 21 November 2018
Accepted: 31 January 2019
First Online: 13 February 2019
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: The study has been approved by the Local University Hospital Ethics Review Board (Xuanwu Hospital, Capital Medical University).
: Written consent form has been obtained from each patient.