Received: 9 March 2019
Accepted: 18 November 2019
First Online: 27 November 2019
Ethics approval and consent to participate
: This study was approved by the ethics committee of Mackay Memorial Hospital, Taipei, Taiwan (approval number: 16MMHIS163). Written informed consent was obtained from all individual participants included in the study.
: Written consent for publication was obtained from all individual participants.
: The authors declare that they have no competing interests.