Yoo, J.
Lee, J.S.
Kim, S.
Kim, B.S.
Choi, H.
Song, D.Y.
Kim, W.B.
Won, C.W.
Article History
Received: 14 March 2018
Accepted: 18 October 2018
First Online: 25 October 2018
Compliance with ethical standards
: This study was approved by the Kyung Hee University Hospital Research Ethics Committee (Approval ID: KHUH 2017-01-069).
: This study used NHIS-Senior data (NHIS-2017-2-328) made by NHIS. Jinho Yoo, Ji Sung Lee, Sunyoung Kim, Byung Sung Kim, Hyunrim Choi, Da Young Song, Won Beom Kim, and Chang Won Won declare no conflict of interest with NHIS.