Funding for this research was provided by:
Research Institute of Korean Medicine Policy (66)
Article History
Received: 24 October 2016
Accepted: 21 February 2018
First Online: 2 March 2018
Ethics approval and consent to participate
: The HIRA Research Ethics Committee of South Korea approved the protocol of this study. Written informed consent was not obtained from participants for their clinical records to be used as this study used national billing data submitted to the HIRA. Patient information was anonymized and de-identified by HIRA prior to analysis in this study.
: Not applicable.
: The authors declare that they have no competing interests.
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