. 2017 Jun 8;3(2):e34. doi: 10.2196/publichealth.7181
©Kristina M Rabarison, Merriah A Croston, Naomi K Englar, Connie L Bish, Shelbi M Flynn, Carolyn C Johnson. Originally published in JMIR Public Health and Surveillance (http://publichealth.jmir.org), 08.06.2017.
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Figure 1.
The engagement ratio equation.