Text and Data Mining valid from 2019-07-01
Received: 31 May 2019
Accepted: 21 June 2019
First Online: 1 July 2019
Ethics approval and consent to participate
: The study protocol was approved by the Institutional Review Board of National Defense Medical College Hospital.
: A written informed consent was obtained from all patients prior to the initiation of this study.
: The authors declare that they have no competing interests.