RT Journal Article SR Electronic T1 Evidence of Protective Effect of Hydroxychloroquine on COVID-19 JF The Journal of Rheumatology JO J Rheumatol FD The Journal of Rheumatology SP 1587 OP 1587 DO 10.3899/jrheum.200638 VO 47 IS 10 A1 Beuy Joob A1 Viroj Wiwanitkit YR 2020 UL http://www.jrheum.org/content/47/10/1587.1.abstract AB