Text and Data Mining valid from 2019-12-01
Received: 9 January 2019
Accepted: 17 September 2019
First Online: 2 December 2019
Ethics approval and consent to participate
: This trial has been approved by the Biomedical Branch of the Ethics Committee of the West China Hospital of Sichuan University (identifier 2016-180). Study participation is voluntary and can be cancelled at any time without provision of reasons and without negative consequences for patients’ future medical care. Informed consent will be obtained from all study participants before they enrol in the trial.
: All authors and investigators/patients give their consent for publication.
: The authors declare that they have no competing interests.