RT Journal Article SR Electronic T1 The MRL/lpr Mouse Model: An Important Animal Model for Systemic Sjögren Syndrome and Polyautoimmunity JF The Journal of Rheumatology JO J Rheumatol FD The Journal of Rheumatology SP jrheum.190820 DO 10.3899/jrheum.190820 A1 Martin Killian A1 Frederic Batteux A1 Stephane Paul YR 2019 UL http://www.jrheum.org/content/early/2019/09/11/jrheum.190820.abstract AB We read with great interest the editorial by Mavragani and Moutsopoulos1, questioning the historical classification of Sjögren syndrome (SS) as primary or secondary.