RT Journal Article SR Electronic T1 No Systemic Lupus Erythematosus with COVID-19 in Hong Kong: The Effect of Masking? JF The Journal of Rheumatology JO J Rheumatol FD The Journal of Rheumatology SP 1591 OP 1591 DO 10.3899/jrheum.200605 VO 47 IS 10 A1 Ho So A1 Joyce Wing Yan Mak A1 Lai-Shan Tam YR 2020 UL http://www.jrheum.org/content/47/10/1591.abstract AB