1. NUA Internet survey (September 2002). How many people are online? http://www.nua.ie/surveys/how_many_online/ (14 March 2003, date last accessed).
2. The UCLA Internet report: surveying the digital future. Year three;Lebo,2003
3. The online health care revolution: how the Web helps Americans take better care of themselves;Fox,2000
4. Utilization of the internet by oncology patients to obtain cancer related information;Metz;Proc Am Soc Clin Oncol,2001
5. Use of internet and other information resources among adult cancer patients and their companions;Yakren;Proc Am Soc Clin Oncol,2001