Text and Data Mining valid from 2019-12-01
Received: 9 December 2018
Accepted: 17 October 2019
First Online: 9 December 2019
Ethics approval and consent to participate
: The current study was approved by the Institutional Review Board of Yiwu Central Hospital, the Affiliated Yiwu Hospital of Wenzhou Medical University and conducted in strict accordance with <i>Declaration of Helsinki</i> (Clinical trial registration number: ChiCTR1900025348). Signed informed consents were obtained from all patients prior to the study.
: Not applicable.
: The authors declare that they have no competing interests.