Low-dose hydroxychloroquine therapy and mortality in hospitalised patients with COVID-19: a nationwide observational study of 8075 participants, Catteau, Lucy, Dauby Nicolas, Montourcy Marion, Bottieau Emmanuel, Hautekiet Joris, Goetghebeur Els, Van Ierssel Sabrina, Duysburgh Els, Van Oyen Herman, Wyndham-Thomas Chloé, et al. , International Journal of Antimicrobial Agents, Jan-10-2020, Volume 56, Issue 4, (2020)