title: [Médical practice variation: supporting the null hypothesis in turbulent times].
authors.forename: Salvador
authors.initials: S
authors.lastname: Peiró
authors.forename: Enrique
authors.initials: E
authors.lastname: Bernal-Delgado
mesh_terms: D006297:Health Services Accessibility; D006302:Health Services Research / Q000379:methods*; D054625:Healthcare Disparities; D006801:Humans; D009313:National Health Programs; D012107:Research Design; D013030:Spain