Funding for this research was provided by:
The Research Fund, Faculty of Medicine, Chiang Mai University (CMU-2562)
Received: 24 January 2019
Accepted: 20 August 2019
First Online: 27 November 2019
Ethics approval and consent to participate
: This study received ethnical approval from the institute review boards of Faculty of Medicine, Chiang Mai University (Ethics Committee 4; Research ID 4981).All participants signed Informed Consent Forms.
: Not applicable.
: The authors declare that they have no competing interests.