The authors thank i+Med Laboratories Company Limited, Thailand, for supplying the IC strips. We are also grateful to Kallayanee Treesuwan, The Associated Medical Sciences-Clinical Service Center, Chiang Mai University, Chiang Mai, Thailand for refinement of English language.
Research funding: None declared.
Author contributions: All authors have accepted responsibility for the entire content of this manuscript and approved its submission.
Competing interests: Authors state no conflict of interest.
Informed consent: Informed consent was obtained from all individuals included in this study.
Ethical approval: The study was approved by the Faculty of Associated Medical Sciences Ethical Committee, Chiang Mai University, Chiang Mai, Thailand (Ethical approval number AMSEC-59EX-043/342/2559).
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