Chronic use of hydroxychloroquine did not protect against COVID-19 in a large cohort of patients with rheumatic diseases in Brazil. - Pileggi GS; Ferreira GA; Reis APMG; Reis-Neto ET; Abreu MM; Albuquerque CP; Araújo NC; Bacchiega AB; Bianchi DV; Bica B; Bonfa ED; Borba EF; et al. (Advances in rheumatology (London, England), 2021)