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2. Number of "cyberchondriacs" – adults who have ever gone online for health information – increases to an estimated 136 million nationwide. [ http://www.harrisinteractive.com/harris_poll/index.asp?PID=686 ]
3. Bansil P, Keenan NL, Zlot AI, Gilliland JC: Health-related information on the web: Results from the HealthStyles survey, 2002–2003. Prev Chronic Dis. 2006, 3: A36-
4. Baker L, Wagner TH, Singer S, Bundorf MK: Use of the internet and e-mail for health care information: Results from a national survey. JAMA. 2003, 289: 2400-2406. 10.1001/jama.289.18.2400.
5. Andreassen H, Sandaune AG, Gammon D, Hjortdahl P: Norwegian use of internet health services. Tidsskr Nor Laegeforen. 2002, 122: 1640-1644.