Here's the link to the Mother Jones article; one of the suspect researchers is now working for Amgen; the Parkinson's Institute is also implicated:
http://www.corpwatch.org/article.php?id=15132
"Two consulting firms linked by court documents to C. Warren Olanow, a Manhattan neurologist who has published at least a dozen articles cited by defense experts, got almost $2.9 million. And the Parkinson's Institute in California got nearly $3.4 million to conduct a four-year study*—not limited to welders—seeking links between Parkinson's symptoms and factors other than manganese, including smoking and drinking. (The institute's research director says the work was neither influenced by its funders, nor will she let them see the resulting manuscript until it has been accepted for publication.)
Fryzek, who now works for Amgen, a California biotech company, did not return phone calls and emails; Olanow and Lees-Haley declined comment. IEI president Joseph McLaughlin insisted in written statements that the manufacturers "had no say whatsoever" in the study's conduct or content, and that it is "common" for funders to view unpublished results."