T Jefferson, C Di Pietrantonj, MG Debalini, A Rivetti, V Demicheli
The British Medical Journal
2003
The association between industry financing and a favorable result was also found in the field of vaccines: Jefferson in 2009, by examining 259 studies on influenza vaccines, they showed that studies funded by government bodies are less likely to give favorable results to vaccines, compared to those funded in whole or in part by industry.
Source: http://www.bmj.com/cgi/content/full/338/feb12_2/b354