Hur, M.
Park, S.-K.
Jung, D. E.
Yoo, S.
Choi, J.-Y.
Kim, W. H.
Kim, J. T.
Bahk, J.-H.
Article History
Received: 24 February 2018
Revised: 18 July 2018
Accepted: 27 August 2018
First Online: 17 September 2018
Compliance with ethical guidelines
:
: M. Hur, S.-K. Park, D. E. Jung, S. Yoo, J.-Y. Choi, W. H. Kim, J.T. Kim and J.-H. Bahk declare that they have no competing interests.
: This study was approved by the Institutional Review Board of Seoul National University Hospital (register number 1609-102-793). All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. Informed consent was obtained from all participants in the study.