... Germany2Professor of Medicine, Faculty of Medicine, University of Calgary, Calgary, Canada3Vice Director of Autoimmune Diagnostics, Laboratory of Prof. Seelig and colleagues, Karlsruhe, GermanyCorresponding ... Germany), Prof.Dr MJ Fritzler (University of Calgary, Calgary, Canada) andby Labor Limbach (Heidelberg, Germany).To assess further the assay specificity, we analyzed agroup of sera from patients ... absence of inhibition can beexplained by the variety of different anti-Sm antibody sub-populations and by the variety of corresponding epitopes.Recently, two polyclonal antibodies (SYM10, SYM11)were...