Shim, Sook Young
Lim, Sun Ah http://orcid.org/0000-0001-8654-4778
Article History
First Online: 19 January 2019
Compliance with Ethical Standards
:
: The authors declare that they have no conflict of interest.
: The study protocol was approved by the IRB of the Korea Institute of Child Care and Education (KICCE) (approval no. 2015-03). All procedures were 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.
: All participants gave consent to be in the annual survey.