Funding for this research was provided by:
The Thousand Talents Program, Sichuan province, China (0082204151045)
Received: 30 June 2017
Accepted: 30 May 2018
First Online: 11 June 2018
Ethics approval and consent to participate
: This trial will be conducted in accordance with the Declaration of Helsinki. The Clinical Trial and Biomedical Ethics Committee of West China Hospital of Sichuan University approved the study (No 2016–234). All participants will be volunteers, and a written informed consent form will be signed. Participants will be able to cease their involvement in the study at any time. If there are any changes to the protocol during the course of the study, an amendment will be submitted to the institutional review board for approval.
: The authors declare that they have no competing interests.
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