Lee, Min Ho
Lee, In Jae
Kim, Tae Jin
Lee, Sang Chul
Jeong, Chang Wook
Hong, Sung Kyu
Byun, Seok-Soo
Oh, Jong Jin
Article History
Received: 28 June 2018
Accepted: 3 October 2018
First Online: 8 October 2018
Compliance with ethical standards
:
: The authors declare that they have no conflicts of interest with any institution or product.
: We obtained Institutional Review Board approval. All procedures performed in studies 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. For this type of study formal consent is not required.
: Informed consent was obtained from all individual participants included in the study.