Funding for this research was provided by:
the Research Special Fund for Public Welfare Industry of Health (201302008)
National Natural Science Foundation of China (81300693, 81571385)
Received: 6 July 2017
Accepted: 27 February 2019
First Online: 5 March 2019
Ethics approval and consent to participate
: The Biomedical Ethics Committee of Beijing Hospital approved the study. Written, informed consent was obtained for all participants prior to the assessments.
: Not applicable.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.