Funding for this research was provided by:
National Natural Science Foundation of China (No. 81673276and No.81373101)
Received: 1 August 2018
Accepted: 12 July 2019
First Online: 17 July 2019
Ethics approval and consent to participate
: Ethics approval for this study was granted by the Independent Ethics Committee Institute of Clinical Pharmacology, Central South University, Changsha, China (Project number: CTXY- 130041-3-2). The participants agreed to participate in this survey and sign an informed consent.
: Not applicable.
: The authors declare that they have no competing interests.