A former US Army orthropedic surgeon, Dr. Timothy Kuklo, previously accused of falsifying a study on a bone growth product used on severely injured Iraq war veterans has resigned his teaching position at Washington University in St. Louis. He was placed on leave earlier this year while the university investigated charges against him. Medtronic, a maker of the bone growth product Infuse, also suspended his consulting contract. The company paid him nearly $800,000 the last few years. An investigation last year by Walter Reed Army Medical Center in Washington, where Dr. Kuklo worked before joining the university, concluded that he had falsified parts of a study that claimed greater benefits than other Army surgeons reported for the Medtronic bone growth product. The Army reported its findings to the university and a medical journal. Dr. Kuklo was also found to have forged the signatures of four listed co-authors, who told Army investigators that they did not approve the study. The British Journal of Bone and Joint Surgery retracted the study earlier this year