Dr. Saket Chattopadhyay was employed as a postdoctoral research fellow from January 15, 2008 to November 8, 2008 in the laboratory of Professor Patrick Arbuthnot at the Department of Pathology, School of Medicine, University of Witwatersrand. Professor Arbuthnot, the director of the Antiviral Gene Therapy Research Unit, wrote a letter verifying Dr. Chattopadhyay's employment at the university during that time period.