title: Letter to the editor.
authors: Iván
authors: I
authors: Ortega-Deballon
mesh_terms: D017732:Air Ambulances / Q000941:ethics / Q000706:statistics & numerical data*; D006801:Humans; D058687:Out-of-Hospital Cardiac Arrest; D013030:Spain; D009927:Tissue and Organ Procurement / Q000191:economics / Q000941:ethics*