Article History
Received: 18 May 2020
Accepted: 10 September 2020
First Online: 16 September 2020
Ethics approval and consent to participate
: This study was approved by the National science and technology ethics committee (approval number: 2017–101) and registered in the Chinese Clinical Trial Register (registration number: ChiCTR2000032035). Written informed consent was obtained from each participant.
: Not applicable.
: The authors declare that they have no competing interests.