Funding for this research was provided by:
a grant of the Korean Mental Health Technology R&D Project, Ministry of Health & Welfare, Republic of Korea (HM14C2578)
Article History
First Online: 11 May 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: All procedures involving human participants were performed in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments, or comparable ethical standards. The experimental protocol was approved by the Institutional Review Board at Severance Hospital, Yonsei University, Seoul, Korea.
: Informed consent was individually obtained from all participants included in the study.