Noted: Several researchers who were involved in the Medtronic-sponsored studies have defended their reports as scientifically sound and free of company influence, either directly or indirectly. For example, one of them, Dr. Thomas A. Zdeblick of the University of Wisconsin, said that he did not have a ?direct financial interest in the success of Infuse or Medtronic.? Over the years, Dr. Zdeblick has received over $20 million in royalty payments from Medtronic in connection with patents on devices, including one that is used with Infuse.