Resumen de Letter to the Editor:: Authors’ Response

M. de los Ángeles Casares, Inmaculada Tomás Carmona

• Maria Angeles Casares-De-Cal Department of Statistics and Operations Research, Oral Sciences Research Group, School of Medicine and Dentistry, University of Santiago de Compostela, Santiago de Compostela, Spain Inmaculada Tomás Department of Stomatology, Oral Sciences Research Group, School of Medicine and Dentistry, University of Santiago de Compostela.