1. Tu , H. T. Surprising decline in consumers seeking health information 2011 http://www.hschange.com/CONTENT/1260/
2. Pew Research Center Health fact sheet 2015 http://www.pewinternet.org/fact-sheets/health-fact-sheet/
3. European Commission Flash Eurobarometer 404: European citizens’ digital health literacy survey 2014 http://ec.europa.eu/commfrontoffice/publicopinion/flash/fl_404_en.pdf
4. The prevalence of online health information seeking among patients in Scotland: a cross-sectional exploratory study;Moreland;JMIR Research Protocols,2015
5. National Library of Medicine Health information 2014 http://www.nlm.nih.gov/hinfo.html