Julie
http://www.cdc.gov/tobacco/data_statistics/sgr/sgr_2006/index.htm
Follow the bibliography database link on that page to find abstracts of about 900 reports.
The tobacco industry is well-known for its strategy of casting doubt on scientific consensus:
“In 1992, a major EPA report warned of the medical harm from second hand smoke. In response, Philip Morris hired the PR firm APCO to create a supposedly independent group, The Advancement of Sound Science Coalition (TASSC), to promote scientists who’d dispute this harm. Enlisting enough other corporate supporters so the effort didn’t seem just a tobacco industry creation, TASSC’s mission echoed the phrase from a memo of fellow tobacco company Brown and Williamson, “Doubt is our product.””
(From Paul Loeb’s article, “TARGET GLOBAL WARMING, TARGET EXXON”, available here: