title: [Letters to the editor].
authors.forename: Estanislao Arana
authors.initials: EA
authors.lastname: Fdez de Moya
authors.forename: Tomás
authors.initials: T
authors.lastname: Ripollés González
mesh_terms: D000488:Allied Health Personnel; D006801:Humans; D011871:Radiology / Q000331:legislation & jurisprudence; D012955:Societies, Medical; D013030:Spain; D014463:Ultrasonography; D000078329:Workforce