Text and Data Mining valid from 2018-06-06
Received: 17 October 2017
Accepted: 4 May 2018
First Online: 6 June 2018
Compliance with ethical standards
: KH Rhyu has received research grants from Zimmer-Biomet Korea and Smith and Nephew Korea has received honoraria for speaking at symposia from Amgen Korea is an Editorial Board member of Hip and Pelvis. YS Chun has received research grants from Zimmer-Biomet Korea, Smith and Nephew Korea and Amgen Korea is an Editorial Board member of <i>Journal of Korean Orthopaedic Association</i>. GY Jung has no conflict of interest. YJ Cho is the Editor-in-chief of <i>Hip and Pelvis</i>.
: All procedures performed in studies involving human participants 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.