Top 5 medical journals to generate advertising revenue in 2009

Here's the list of the top 5 medical journals that generate advertising revenue:

1. New England Journal of Medicine (NEJM)
2. Journal of the American Medical Association (JAMA)
3. American Family Physician - this is the journal of AAFP
   
4. Journal of Clinical Oncology (JCO) - this is the journal of ASCO
   
5. Family Practice News

Are you surprised by the list? The world of oncology is strong with pipeline drugs, biologic agents, and profits from sales. The pharma/biotech advertising trend appears to be moving away from traditional print and more to online formats.

Do you think we'll ever see medical journals that are free of advertising? How would publishers survive?