1. The association between patient activation and accessing online health information: results from a national survey of US adults
2. Google. “About Knowledge Panels.” Accessed December 5, 2019. https://support.google.com/knowledgepanel/answer/9163198?hl=en.
3. Google. “How Google’s Featured Snippets Work.” Accessed December 5, 2019. https://support.google.com/websearch/answer/9351707?hl=en.
4. Fishkin, Rand. “Less Than Half of Google Searches Now Result in a Click.” SparkToro. August 13, 2019. https://sparktoro.com/blog/less-than-half-of-google-searches-now-result-in-a-click/
5. Ray, Lily. “We Surveyed 1,400 Searchers about Google – Here’s What We Learned.” Moz, April 22, 2019. https://moz.com/blog/new-google-survey-results.