Complex sentence: Since the 1960s the demand for emergency psychiatric services has endured a rapid growth due to deinstitutionalization both in Europe and the United States, increases in the number of medical specialties, and the multiplication of transitory treatment options, such as psychiatric medication.
Split into simpler sentences: Since the 1960s the demand for emergency psychiatric services has endured a rapid growth due to deinstitutionalization both in Europe and the United States. There have been increases in the number of medical specialties, and the multiplication of transitory treatment options, such as psychiatric medication.