Funding for this research was provided by:
The Scientific Innovation Team Project of Ningbo (2013B82010)
Ningbo Health Branding Subject Fund (PPXK2018-03)
Natural Science Foundation of Ningbo (2017A610152)
Received: 20 March 2019
Accepted: 3 June 2019
First Online: 14 June 2019
Ethics approval and consent to participate
: The study was approved by the Ethics Committee of the Second Affiliated Hospital, Zhejiang University School of Medicine. All procedures performed in this study were in accordance with the 1964 Helsinki Declaration and its later amendments. Written informed consent was obtained from all patients included in the study.
: All listed authors have actively participated in the study and have read and approved the submitted manuscript.
: The authors declare that they have no competing interests.