Funding for this research was provided by:
National Research Foundation of Korea (2015R1A5A2009124, 2017R1C1B507916)
Korea Health Industry Development Institute (HI18C0453)
Article History
Received: 4 April 2019
Accepted: 3 September 2019
First Online: 27 September 2019
Competing Interests
: The authors declare no competing interests.