Original sentence: By 1939, the University of Pittsburgh had helped to form the beginnings of an academic medical center by  establishing the University Medical Center which included Falk Clinic, Children's, Eye and Ear, Libby Steele Magee, Presbyterian General, and Women's Hospitals
Edited sentence: By the end of the 1930s, the University of Pittsburgh had helped to form the beginnings of an academic medical center by  establishing the University Medical Center which included Falk Clinic, Children's, Eye and Ear, Libby Steele Magee, Presbyterian General, Women's, and Municipal Hospitals