Received: 25 December 2019
Accepted: 13 July 2020
First Online: 25 July 2020
Ethics approval and consent to participate
: I confirm that I have read the Editorial Policy pages. This study was conducted with approval from the Ethics Committee of Shengjing Hospital of China medical University. This study was conducted in accordance with the declaration of Helsinki.
: Not applicable.
: The authors declare that they have no competing interests.