. 2020 Apr 24;6(2):e19218. doi: 10.2196/19218
©Atte Oksanen, Markus Kaakinen, Rita Latikka, Iina Savolainen, Nina Savela, Aki Koivula. Originally published in JMIR Public Health and Surveillance (http://publichealth.jmir.org), 24.04.2020.
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