. 2021 Apr 1;9(4):e23989. doi: 10.2196/23989
©Sebastian Linnemayr, Rushil Zutshi, William Shadel, Eric Pedersen, Maria DeYoreo, Joan Tucker. Originally published in JMIR mHealth and uHealth (http://mhealth.jmir.org), 01.04.2021.
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Figure 2.
Cell phone and number retention at follow-up (n=66).