Researchers at Brigham & Women’s Hospital have found that complications caused by some bone-growth products, used in spinal fusion surgery, increase hospital stays and costs between 11% and 41%. The research conducted by a team of scientists and published in the “Journal of the American Medical Association” studied Medtronic Incorporated’s “InFuse” and Stryker Corporation’s “OP-1 Implant” and “OP-1 Putty” products.