title: Breathing frequency monitors.
mesh_terms: D001049:Apnea / Q000175:diagnosis; D006801:Humans; D008991:Monitoring, Physiologic / Q000295:instrumentation* / Q000379:methods; D012119:Respiration; D013398:Sudden Infant Death / Q000517:prevention & control*; D014481:United States; D014486:United States Food and Drug Administration