Funding for this research was provided by:
Young Scholar Support Program of China Medical University (QGZ2018053)
Doctoral Start-up Foundation of Liaoning Province (2019-BS-286)
Article History
Received: 27 November 2019
Accepted: 7 July 2020
First Online: 11 July 2020
Ethics approval and consent to participate
: The study complied with the Declaration of Helsinki and was approved by the Ethics Committee of Shengjing hospital of China Medical University.The present study retrospectively analyzed data abstracted from the hospital information system of Shengjing Hospital of China Medical University without interventions or disruptions to patients’ lives, and no direct human participants were involved, thus informed consent was not required and waived by the Ethics Committee.
: Not applicable.
: The authors declare that they have no competing interests.