title: Specialization in nursing: from then to now.
mesh_terms: D003479:Curriculum; D004508:Education, Nursing, Baccalaureate; D004509:Education, Nursing, Continuing; D004511:Education, Nursing, Graduate / Q000266:history; D006666:History of Medicine; D007318:Inservice Training; D009722:Nurse Practitioners; D013041:Specialties, Nursing / Q000266:history*; D009626:Terminology as Topic; D014481:United States