Professor Hudson was chairman of the History of Medicine Department at the University of Kansas from 1966 to 1994. Hudson participated in only one tobacco-related trial. He was contacted by John Burnham, another expert witness for the tobacco companies. Hudson made around $92,000 for his tobacco-related work in litigation.
 Proctor, Robert. 2006. ‘Everyone Knew But No One Had Proof’: Tobacco Industry Use of Medical History Expertise in US courts, 1990-2002. Tobacco Control 15, 121.
 Deposition of Robert Hudson, M.D., Ph.D., March 14, 1994, Allgood v. R.J. Reynolds, 14/03/1994. LTDL. Bates Number: HUDSONR031494. http://legacy.library.ucsf.edu/tid/obr07a00. 31 Oct 2014, 136-137.