Complex sentence: McLean is differentiated from its New England peers (such as The Institute of Living and the Brattleboro Retreat) by its combination of teaching, treatment, and research; most other facilities focus on only one of these priorities.
Split into simpler sentences: McLean is differentiated from its New England peers (such as The Institute of Living and the Brattleboro Retreat) by its combination of teaching, treatment, and research. Most other facilities focus on only one of these priorities.