. . . "equivalent to those at MD-granting medical schools" . "Osteopathic physicians and M.D. physicians are very similar" . "Comparison of MD and DO in the United States" . . "nearly identical" . . . "Comparison of MD and DO in the United States" . "Comparison of MD and DO Residencies in the United States" . "equivalent" . "distinction between the MD and the DO professions" .