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Article History

Accepted: 12 December 2020

First Online: 18 January 2021

Compliance with ethical standards

:

: The authors declare that they have no conflict of interest.

: Ethical approval was not sought for the present study because (1) the data is completely anonymous with no personal information being collected (apart from their name, their publically available contact details and a record of consent), (2) the data is not considered to be sensitive or confidential in nature, (3) the issues being researched are not likely to upset or disturb participants, (4) vulnerable or dependent groups are not included and (5) there is no risk of possible disclosures or reporting obligations.

: The study was conducted in accordance with Korean National Statistics Act, Article 33 (Protection of Secrets); (1) matters belonging to the confidential information of individuals, corporations, organizations, etc. that have become known in the course of producing statistics shall be protected, and (2) data belonging to the confidential information of individuals, corporations, organizations, etc. that have been produced for the production of statistics shall not be used for any purpose other than that of producing statistics.

: Verbal informed consent was obtained from all subjects before the study.