©Chun-Yin Yeh, Yi-Ting Chung, Kun-Ta Chuang, Yu-Chen Shu, Hung-Yu Kao, Po-Lin Chen, Wen-Chien Ko, Nai-Ying Ko. Originally published in JMIR mHealth and uHealth (http://mhealth.jmir.org), 10.02.2021.
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