Which organization was formed in 1950 in Kansas City to establish professional standards for athletic trainers?

The National Athletic Trainers Association (NATA) was formed in 1950 in Kansas City with the primary mission of establishing professional standards for athletic trainers. This organization was pivotal in the development of the profession, focusing on education, certification, and the advancement of athletic training as a recognized healthcare discipline. NATA has played a significant role in advocating for the profession and is integral in providing resources and support for trainers to ensure high standards of practice in the athletic training field.

Other organizations listed, such as the International Federation of Sports Medicine or the American College of Sports Medicine, are involved in different aspects of sports health and medicine but do not specifically focus on establishing professional standards for athletic trainers as NATA does. The American Academy of Family Physicians is primarily oriented towards family medicine and does not relate directly to athletic training. Thus, NATA is the most appropriate answer in the context of establishing professional standards for athletic trainers.