Article History
Received: 27 May 2019
Accepted: 6 September 2019
First Online: 23 September 2019
Ethics approval and consent to participate
: The study was approved by the Ethics Committee of the Shengjing Hospital of China Medical University and conducted in accordance with the Declaration of Helsinki.
: All the authors in this paper consent to publication of the work.
: The authors declare that they have no competing interests.