Kim, Yeon-Pyo
Choe, Yu-Ri
Park, Jong-Heon
Kim, Sunyoung
Won, Chang-Won
Hwang, Hwan-Sik
Article History
Received: 26 December 2018
Accepted: 17 April 2019
First Online: 30 April 2019
Compliance with ethical standards
:
: This study made use of the National Health Information Database (NHIS-2018-4-015) created by the National Health Insurance Service (NHIS). The authors declare no conflict of interest with regard to the NHIS.
: This study adhered to the Personal Information Act and the Personal Information Processing Guideline of the NHIS and the Institutional Review Board of Hanyang University Hospital (HYUH 2015-06-011).
: For this type of study, formal consent is not required.