American Osteopathic Association

The American Osteopathic Association (AOA) is the representative member organization for the more than 197,000 osteopathic medical doctors (D.O.s) and osteopathic medical students in the United States. The AOA is headquartered in Chicago, Illinois, and is involved in post-graduate training for osteopathic physicians.

Source: Wikipedia — American Osteopathic Association (CC BY-SA 4.0)