Media type: E-Article Title: Preface Contributor: Ulloa-Aguirre, Alfredo; Kershenobich-Stalnikowitz, David imprint: Publicidad Permanyer, SLU, 2021 Published in: Revista de investigaci�n Cl�nica Language: English DOI: 10.24875/ric.21000423 ISSN: 0034-8376 Keywords: General Medicine Origination: Footnote: Access State: Open Access