title: In reply to Williams.
authors.affiliation: Unidad de Atención Integral al Cáncer, Hospital Universitario Puerta del Mar, Cádiz, Spain.
authors.forename: Javier
authors.initials: J
authors.lastname: Jaén
mesh_terms: D001943:Breast Neoplasms / Q000532:radiotherapy*; D005260:Female; D006801:Humans; D008168:Lung / Q000528:radiation effects*