Niederkorn A, Frühauf J, Schwantzer G, Wutte N, Painsi C, Werner S, Stradner M, Berghold A, Hermann J, Aberer E. CXCL13 is an activity marker for systemic, but not cutaneous lupus erythematosus: a longitudinal cohort study. Archives of Dermatological Research. 2018 May 04;310(6):485–93. doi: 10.1007/s00403-018-1836-6.