Funding for this research was provided by:
Korea Institute of Energy Technology Evaluation and Planning (20162220100050)
Korea Institute of Energy Technology Evaluation and Planning (20161120100350)
Korea Institute of Energy Technology Evaluation and Planning (20172510102130)
National Research Foundation of Korea (NRF-2016H1D5A1910564)
National Research Foundation of Korea (2016R1D1A3B03931927)
Article History
First Online: 25 May 2018
Compliance with ethical standards
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: The authors declare no conflict of interest.