Response to: ‘Hydroxychloroquine ineffective for COVID-19 prophylaxis in lupus and rheumatoid arthritis’ by Singer et al
Manuel Francisco Ugarte-Gil, Maximilian F Konig, Peter Korsten, Francis Berenbaum, Alfred Hyoungju Kim, Jeffrey A Sparks
Annals of the Rheumatic Diseases Sep 2022, 81 (9) e162; DOI: 10.1136/annrheumdis-2020-218683