MASTER REGISTRY PARTICIPATION AGREEMENTAgreement • February 24th, 2023 • IllinoisTHIS AGREEMENT is entered into and made effective the day of , 20 (“Effective Date”), by and between (a) THE AMERICAN ACADEMY OF ORTHOPAEDIC SURGEONS, an Illinois not-for-profit corporation, with its principal place of business at 9400 West Higgins Road, Rosemont, Illinois 60018 (“AAOS”); and (b) entity known as (“Participant”).