Complex sentence: She is Professor of Neurology and Pathology at BU, was an assistant professor at Harvard Medical School (1991-94), completed fellowship in neuropathology at Massachusetts General Hospital, and residency in neurology at Cleveland Metropolitan General Hospital.
Split into simpler sentences: She is Professor of Neurology and Pathology at BU, was an assistant professor at Harvard Medical School from 1991 to 1994. She completed fellowship in neuropathology at Massachusetts General Hospital, and residency in neurology at Cleveland Metropolitan General Hospital.