. 2020 Nov 5;8(11):e19159. doi: 10.2196/19159
©Hyeyeon Lee, Hyeonkyeong Lee, Youlim Kim, Sookyung Kim, Young-Me Lee. Originally published in JMIR mHealth and uHealth (http://mhealth.jmir.org), 05.11.2020.
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Figure 1.
Co-occurrence matrix. The darker the color of the square, the more frequently the pair of words appears.