title: Forces of change.
authors: Associate Editor, AJPH.
authors: Paul Campbell
authors: PC
authors: Erwin
mesh_terms: D000068:Accreditation; D006291:Health Policy; D006801:Humans; D058991:Patient Protection and Affordable Care Act; D011157:Population Dynamics; D011635:Public Health Administration / Q000639:trends*; D061108:Social Media; D014481:United States