Pih, Gyu Young
Na, Hee Kyong
Ahn, Ji Yong
Jung, Kee Wook
Kim, Do Hoon
Lee, Jeong Hoon
Choi, Kee Don
Song, Ho June
Lee, Gin Hyug
Jung, Hwoon-Yong
Article History
Received: 28 February 2018
Accepted: 15 June 2018
First Online: 28 June 2018
Ethics approval and consent to participate
: The study was approved and authorized by the hospital’s ethical committee (Asan Medical Center). Ethical approval number: 2017–1399. The consent of patients was waived by the hospital’s ethical committee.
: Not applicable.
: The authors declare that they have no competing interests.
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