AUTHOR=Tzouvelekis Argyris , Karampitsakos Theodoros , Bouros Demosthenes TITLE=The Role of Hydroxychloroquine in Coronavirus Disease 2019. A Versatile Tool at the Service of Humanity JOURNAL=Frontiers in Medicine VOLUME=7 YEAR=2020 URL=https://www.frontiersin.org/journals/medicine/articles/10.3389/fmed.2020.00176 DOI=10.3389/fmed.2020.00176 ISSN=2296-858X