Kim, Youn-Jung
Ko, Byuk Sung
Park, Seo Young
Oh, Dong Kyu
Hong, Sang-Bum
Jang, Seongsoo
Kim, Won Young
Funding for this research was provided by:
Green Cross
Article History
Received: 14 June 2019
Accepted: 23 October 2019
First Online: 12 November 2019
Competing interests
: Won Young Kim has received honoraria from Green Cross. The remaining authors declare that they have no competing interests. Green Cross did not engage the design of the study and collection, analysis, interpretation of data and writing the manuscript.