title: Challenges to unity.
authors.forename: J F
authors.initials: JF
authors.lastname: Conley
mesh_terms: D002140:California; D003695:Delivery of Health Care / Q000639:trends; D003729:Dental Care / Q000639:trends; D003813:Dentistry / Q000639:trends*; D006801:Humans; D008005:Licensure, Dental / Q000639:trends; D011364:Professional Practice / Q000639:trends