Table 1. Web Sites Analyzed

Classification Name of Web Site Aggregation Period No. of Visitors (daily average) No. of Page Views (daily average)

Cancer center Cancer center Web site A September 1, 2006 to November 30, 2006 42,663
Cancer center Cancer center Web site B October 1, 2006 to November 30, 2006 62,181
Hospital Hospital Web site C August 1, 2006 to November 30, 2006 8026
Hospital Cancer center Web site D March 26, 2006 to November 18, 2006; October 15, 2006 to January 13, 2007
Hospital Hospital Web site D October 1, 2006 to December 31, 2006 421
Hospital Hospital Web site E November 1, 2006 to December 31, 2006
Pharmaceutical company Pharmaceutical company Web site A November 1, 2006 to December 31, 2006
Pharmaceutical company Pharmaceutical company Web site B November 1, 2006 to December 31, 2006
Pharmaceutical company Pharmaceutical company Web site C November 1, 2006 to December 31, 2006
Pharmaceutical company Pharmaceutical company Web site D November 1, 2006 to December 31, 2006
Pharmaceutical company Pharmaceutical company Web site E November 1, 2006 to December 31, 2006
Individual Individual antiaging Web site A December 1, 2006 to December 31, 2006
Cancer patient Cancer blog B October 1, 2006 to December 31, 2006
Cancer patient Cancer blog C October 1, 2006 to December 31, 2006
Cancer patient Cancer blog D December 2, 2006 to January 12, 2007
Cancer patient Pediatric cancer blog E December 10, 2006 to January 27, 2007
Cancer patient Pediatric cancer blog F December 10, 2006 to January 27, 2007
Cancer patient Childhood leukemia blog G December 10, 2006 to January 27, 2007
Cancer patient Leukemia blog H October 8, 2006 to January 8, 2007
Cancer patient Leukemia blog I October 6, 2006 to January 5, 2007
Cancer patient Breast cancer blog J January 1, 2007 to February 28, 2007 198
Cancer patient Breast cancer blog K January 1, 2007 to February 28, 2007 161
Cancer patient Leukemia blog L January 1, 2007 to February 28, 2007 173
Cancer patient Ureteral cancer blog M January 1, 2007 to February 28, 2007 51
Cancer patient Individual cancer link site N January 1, 2007 to February 28, 2007