Text and Data Mining valid from 2019-10-22
Received: 31 May 2019
Accepted: 20 September 2019
First Online: 22 October 2019
Ethics approval and consent to participate
: This research protocol was approved by the ethical committee of the institutional review board of China Medical University and a consent form was signed by each participating patient.
: Not applicable.
: The authors declare no conflict of interest.