title: [Letters to the editor].
authors.forename: Christian José
authors.initials: CJ
authors.lastname: Pallares
authors.forename: Ernesto
authors.initials: E
authors.lastname: Martínez
mesh_terms: D003428:Cross Infection / Q000401:mortality*; D005260:Female; D017052:Hospital Mortality; D006785:Hospitals, University / Q000706:statistics & numerical data*; D006801:Humans; D008297:Male; D062606:Tertiary Care Centers / Q000706:statistics & numerical data*