Calderón de la Cruz GA, Dominguez Lara SA. Is it necessary to describe the instruments used in empirical research?. An Fac med [Internet]. 2016 Jun. 24 [cited 2024 Jul. 17];77(2):175-7. Available from: https://revistasinvestigacion.unmsm.edu.pe/index.php/anales/article/view/11825