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2. 2019. Majority of Adults Look Online for Health Information | PEW ResearchCenter. https://www.pewresearch.org/fact-tank/2013/02/01/majority-of-adults-look-online-for-health-information/. https://www.pewresearch.org/fact-tank/2013/02/01/majority-of-adults-look-online-for-health-information/ 2019. Majority of Adults Look Online for Health Information | PEW ResearchCenter. https://www.pewresearch.org/fact-tank/2013/02/01/majority-of-adults-look-online-for-health-information/. https://www.pewresearch.org/fact-tank/2013/02/01/majority-of-adults-look-online-for-health-information/
3. What do we know about theh index?