given by this subspecialty orthopedic society. 12. The Orthopaedic Trauma Association (OTA) (http:// www.ota.org). The OTA serves to promote excellence in care for the injured patient. Varied areas of concern include disaster preparation, child abuse, cause and prevention of injury in motor sports, and patient with multiple fractures and musculoskeletal injuries. The OTA is very active in resident and surgeon education through courses. There are lectures available on the web site on over 75 topics in trauma. There are several membership categories including those for residents. 13. The Pediatric Orthopaedic Society of North America (POSNA) (http://www.posna.org) specializes in the care of children’s musculoskeletal health. Some areas of interest include the treatment of osteochondritis dissecans, amputation in the child, congenital deformity, pediatric hip and knee disorders, joint injuries, and growth and injury to the pediatric athlete. Further information regarding specialty societies may be found on their web sites as indicated with each subspecialty. References 1. Bernstein J, ed. Musculoskeletal medicine; American Academy of Orthopaedic Surgeons, American Academy of Family Physicians, American Academy of Pediatrics. Rosemont, IL, American Academy of Orthopaedic Surgeons. 2003:xxi. 2. Available at: https://www.abos.org/ModDefault.aspx?module Public 2017 American College of Rheumatology/ American Association of Hip and Knee Surgeons Guideline for the Perioperative Management of Antirheumatic Medication in Patients With Rheumatic Diseases Undergoing Elective Total Hip or Total Knee Arthroplasty SUSAN M. GOODMAN,1 BRYAN SPRINGER,2 GORDON GUYATT,3 MATTHEW P. ABDEL,4 VINOD DASA,5 MICHAEL GEORGE,6 ORA GEWURZ-SINGER,7 JON T. GILES,8 BEVERLY JOHNSON,9 STEVE LEE,10 LISA A. MANDL,1 MICHAEL A. MONT,11 PETER SCULCO,1 SCOTT SPORER,12 LOUIS STRYKER,13 MARAT TURGUNBAEV,14 BARRY BRAUSE,1 ANTONIA F. CHEN,15 JEREMY GILILLAND,16 MARK GOODMAN,17 ARLENE HURLEY-ROSENBLATT,18 KYRIAKOS KIROU,1 ELENA LOSINA,19 RONALD MacKENZIE,1 KALEB MICHAUD,20 TED MIKULS,21 LINDA RUSSELL,1 ALEXANDER SAH,22 AMY S. MILLER,14 JASVINDER A. SINGH,23 AND ADOLPH YATES17 Guidelines and recommendations developed and/or endorsed by the American College of Rheumatology (ACR) are intended to provide guidance for particular patterns of practice and not to dictate the care of a particular patient. The ACR considers adherence to the recommendations within this guideline to be voluntary, with the ultimate determination regarding their application to be made by the physician in light of each patient’s individual circumstances. Guidelines and recommendations are intended to promote beneficial or desirable outcomes but cannot guarantee any specific outcome. Guidelines and recommendations developed and endorsed by the ACR are subject to periodic revision as warranted by the evolution of medical knowledge, technology, and practice. ACR recommendations are not intended to dictate payment or insurance decisions. These recommendations cannot adequately convey all uncertainties and nuances of patient care. The American College of Rheumatology is an independent, professional, medical and scientific society that does not guarantee, warrant, or endorse any commercial product or service. This article is published simultaneously in Arthritis & Rheumatology and the Journal of Arthroplasty. Supported by the American College of Rheumatology and the American Association of Hip and Knee Surgeons. 1 Susan M. Goodman, MD, Lisa A. Mandl, MD, MPH, Peter Sculco, MD, Barry Brause, MD, Kyriakos Kirou, MD, Ronald MacKenzie, MD, Linda Russell, MD: Hospital for Special Surgery/Weill Cornell Medicine, New York, New York; 2 Bryan Springer, MD: OrthoCarolina Hip and Knee Center, Charlotte, North Carolina; 3 Gordon Guyatt, MD: McMaster University, Hamilton, Ontario, Canada; 4 Matthew P. Abdel, MD: Mayo Clinic, Rochester, Minnesota; 5 Vinod Dasa, MD: Louisiana State University, New Orleans; 6 Michael George, MD: University of Pennsylvania, Philadelphia; 7 Ora GewurzSinger, MD: University of Michigan, Ann Arbor; 8 Jon T. Giles, MD, MPH: Columbia University, New York, New York; 9 Beverly Johnson, MD: Albert Einstein College of Medicine, Bronx, New York; 10Steve Lee, DO: Kaiser Permanente, Fontana, California; 11Michael A. Mont, MD: Cleveland Clinic, Cleveland, Ohio; 12Scott Sporer, MD: Midwest Orthopaedics at Rush, Chicago, Illinois; 13Louis Stryker, MD: University of Texas Medical Branch, Galveston; 14Marat Turgunbaev, MD, MPH, Amy S. Miller: American College of Rheumatology, Atlanta, Georgia; 15Antonia F. Chen, MD, MBA: Rothman Institute, Thomas Jefferson University Hospital, Philadelphia, Pennsylvania; 16Jeremy Gililland, MD: University of Utah, Salt Lake City; 17Mark Goodman, MD, Adolph Yates, MD: University of Pittsburgh, Pittsburgh, Pennsylvania; 18Arlene Hurley-Rosenblatt, ANP: Rockefeller University, New York, New York; 19Elena Losina, PhD: 1111 Objective. This collaboration between the American College of Rheumatology and the American Association of Hip and Knee Surgeons developed an evidence-based guideline for the perioperative management of antirheumatic drug