Text and Data Mining valid from 2019-05-06
Received: 25 June 2018
Accepted: 3 January 2019
First Online: 6 May 2019
Compliance with ethical standards
: The authors declare that they have no conflict of interest.
: The study was approved by the Institutional Review Board of Kyung Hee University Hospital at Gangdong [2017-05-018].
: Informed consent was obtained from all human tissue donors.