Complex sentence: He obtained a bachelor's degree from MIT in 1976 and an MD from Cornell University Medical College in 1980, after which he spent six years as a research associate in neuroendocrinology at Rockefeller University.
Split into simpler sentences: He obtained a bachelor's degree from MIT (1976) and an M.D. degree from Cornell University Medical College (1980). He then spent six years as a research associate in neuroendocrinology at Rockefeller University.