Dr. Foley's attorney, Buckner Wellford, said there was no reason for Dr. Foley to disclose his Medtronic relationship to Mr. Roberson because the pedicle screws he used in the surgery, though made by Medtronic, weren't invented by Dr. Foley and earned him no royalties.

WSJ: Top Spine Surgeons Reap Royalties, Medicare Bounty