Funding for this research was provided by:
Beijing Municipal Science & Technology Commission (Z181100001718107)
Fund for Fostering Scientific Backbone of Beijing Tongren Hospital Affiliated to Capital Medical University (2015-YJJ-GGL-014)
Received: 5 July 2020
Accepted: 10 September 2020
First Online: 15 September 2020
Ethics approval and consent to participate
: This study was approved by the local Ethics Committee of Beijing Tongren Hospital, number TRECKY2016–015. The study design, the anonymous data acquisition, and the publication of the data were in accordance with the Declaration of Helsinki. All patients signed written informed consent before participation.
: Not applicable.
: The authors declare that they have no competing interests.