Complex sentence: He graduated from the University of Liverpool School of Medicine, and worked in the UK until 1963 when he moved to the United States and completed his anesthesiology residency at SUNY Upstate Medical University in Syracuse, New York.
Split into simpler sentences: He graduated from the University of Liverpool School of Medicine, and worked in the UK until 1963 when he moved to the United States. He completed his anesthesiology residency at SUNY Upstate Medical University in Syracuse, New York.