Gregory Polkowski, M.D., is associate professor of Orthopaedic Surgery at Vanderbilt University Medical Center. In addition to co-chairing development of the AAOS CPG for osteoarthritis of the hip, he is co-chairing guidelines on the diagnosis and prevention of periprosthetic joint infections around hip and knee replacement surgery. Polkowski is a member of the board of directors of the American Association of Hip and Knee Surgeons (AAHKS).