Prevalence and Economic Impact of Acute Respiratory Failure in the Prehospital Emergency Medical Service of the Madrid Community: Retrospective Cohort Study - Cintora-Sanz, Ana Maria; Horrillo-Garcia, Cristina; Quesada-Cubo, Victor; Perez-Alonso, Ana Maria; Gutierrez-Misis, Alicia (JMIR Public Health Surveill, 2025)