Osteopathic Medicine is a complete, holistic branch of medicine founded by an American physician, Andrew Taylor Still, practicing in Missouri in the late 1800s. In the United States, DOs (Doctors of Osteopathic Medicine), like MDs, are granted the full scope of medical practice, including diagnosing all diseases as well as prescribing drugs and performing surgery. They attend four-year Osteopathic medical schools which require the same pre-requisites as conventional medical schools. They then complete internships and residencies in any medical specialty, often training side-by-side with MDs. While most Osteopathic Physicians practice general Family Medicine, there are many Osteopathic Pediatricians, OB-GYNs, Internists, Surgeons, Psychiatrists, Radiologists, etc. In addition to favoring primary care specialties, DOs often practice in rural areas.