Cho, In Young
Cho, Mi Hee
Lee, Kiheon
Park, Sang Min
Lee, Hyejin
Son, Joung Sik
Kim, Kyuwoong
Choi, Seulggie
Chang, Jooyoung
Koo, Hye-Yeon
Bae, Ye Seul
Kim, Sung Min
Article History
Received: 28 July 2019
Accepted: 31 January 2020
First Online: 27 February 2020
Compliance with ethical standards
: This study was approved by the Institutional Review Board at Seoul National University Bundang Hospital (IRB No. X-1809-493-902), which waived informed consents from study participants due to anonymity of the data from the NHIS database. The study was conducted in accordance with the ethical standards of the institutional research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: None.