Complex sentence: In 1982, the disease had been linked with abnormally large von Willebrand factor multimers, and the identification of a deficient protease in people with TTP was made in 1998s.
Split into simpler sentences: In 1982, the disease had been linked with abnormally large von Willebrand factor multimers. The identification of a deficient protease in people with TTP was made in 1998s.