Ryu, Eunmi
Kim, Heesun
Shin, Yeongsoo
Funding for this research was provided by:
the Ministry of Land, Infrastructure and Transport of Korean government ([20AUDP-B100356-06])
National Research Foundation of Korea (NRF-2017R1A2B4009072)
Article History
Received: 20 July 2020
Accepted: 17 October 2020
First Online: 18 December 2020
Competing interests
: The authors declare that they have no competing interests.