ROYO-BORDONADA, Miguel Ángel; GARCIA-LOPEZ, Fernando José; CORTES, Fátima  and  ANDRES ZARAGOZA, Gustavo. Face masks in the general healthy population. Scientific and ethical issues. Gac Sanit [online]. 2021, vol.35, n.6, pp.580-584.  Epub Apr 04, 2022. ISSN 0213-9111.