Complex sentence: The hospital staff, including Dr. Sheehan posing as Aule and a nurse posing as Rachel Solando, were part of the test, and the migraines that Laeddis suffered were withdrawal symptoms from his medication, as well as hallucinating the "real Rachel Solando".
Split into simpler sentences: The hospital staff, including Dr. Sheehan posing as Aule and a nurse posing as Rachel Solando, were part of the test. The migraines that Laeddis suffered were withdrawal symptoms from his medication, as were the hallucinations of the "real Rachel Solando".