Ahn, Yong
Keum, Han Joong
Shin, Sang Ha
Choi, Jung Ju
Funding for this research was provided by:
Korea Health Industry Development Institute (HI16C2319)
Article History
Received: 21 January 2019
Accepted: 6 May 2019
First Online: 17 May 2019
Compliance with ethical standards
: This study was approved by the ethical committee of the study center (approval no.: WRDIRB 2016-12-012), and written informed consent was obtained from the patients.
: The authors declare that they have no conflict of interest.
: All procedures performed in the study were in accordance with the ethical standards of the Wooridul Spine Hospital and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. The study was approved by the ethical committee of the Wooridul Spine Hospital.