Dejkriengkraikul, Kittamet
Pattanakuhar, Sintip
Hama, Tuankasfee
Tongprasert, Siam http://orcid.org/0000-0003-0497-4585
Article History
Received: 20 April 2020
Revised: 23 May 2020
Accepted: 27 May 2020
First Online: 8 June 2020
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: The study protocol was exempted from ethical approval by the Institutional Ethics Committee of the Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand since no identifiable data of the sampled tracings were exposed to the researchers. The authors certify that all applicable institutional and governmental regulations concerning the ethical use of human volunteers were followed during all courses of this study.