Received: 8 July 2019
Accepted: 8 January 2020
First Online: 4 February 2020
Ethics approval and consent to participate
: The Cangzhou hospital of integrated TCM-WM·Hebei Ethics Committee approved this study (Approval number: 2019030). Written informed consent was obtained from each subject.
: Written consent for publish from the participant (or legal parent or guardian for children) to report individual patient data.
: The authors declare that they have no competing interests.