. 2018 May 2;4(2):e48. doi: 10.2196/publichealth.9408
©Jacob T Borodovsky, Lisa A Marsch, Alan J Budney. Originally published in JMIR Public Health and Surveillance (http://publichealth.jmir.org), 02.05.2018.
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Figure 4.
Percentage of US population in each state versus percentage of Facebook sample in each state.