. 2021 Jul 6;9(7):e24796. doi: 10.2196/24796
©Shigeo Muro, Masato Ishida, Yoshiharu Horie, Wataru Takeuchi, Shunki Nakagawa, Hideyuki Ban, Tohru Nakagawa, Tetsuhisa Kitamura. Originally published in JMIR Medical Informatics (https://medinform.jmir.org), 06.07.2021.
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Figure 1.
Flow diagram of the study. COPD: chronic obstructive pulmonary disease.