Yoo, Sooyoung
Baek, Hyunyoung
Doh, Kibbeum
Jeong, Jiyeoun
Ahn, Soyeon
Oh, Il-Young
Kim, Kidong http://orcid.org/0000-0001-9254-6024
Funding for this research was provided by:
SK Telecom
Article History
Received: 4 February 2018
Revised: 27 June 2018
Accepted: 18 September 2018
First Online: 21 September 2018
Compliance with ethical standards
:
: There are no conflicts of interest. This work was supported by SK Telecom Co. Ltd.
: This study was funded by SK Telecom Co. Ltd. All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional research committee and with the Helsinki declaration and its later amendments or comparable ethical standards. Informed consent was obtained from all individual participants included in the study.