title: Nurse practitioners and certified nurse-midwives: a meta-analysis of studies on nurses in primary care roles.
authors: S A
authors: SA
authors: Brown
authors: D E
authors: DE
authors: Grimes
mesh_terms: D002568:Certification; D005260:Female; D006801:Humans; D009721:Nurse Midwives; D009722:Nurse Practitioners; D011247:Pregnancy; D011321:Primary Nursing; D012380:Role; D016896:Treatment Outcome