Published on in Vol 4, No 2 (2018): Jul-Dec
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/11073, first published
.
![How to Optimize Health Messages About Cancer on Facebook: Mixed-Methods Study How to Optimize Health Messages About Cancer on Facebook: Mixed-Methods Study](https://asset.jmir.pub/assets/b856180722d6d16a74af1fba3a69f555.png 480w,https://asset.jmir.pub/assets/b856180722d6d16a74af1fba3a69f555.png 960w,https://asset.jmir.pub/assets/b856180722d6d16a74af1fba3a69f555.png 1920w,https://asset.jmir.pub/assets/b856180722d6d16a74af1fba3a69f555.png 2500w)
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