CD79A and rheumatoid arthritis: The O- and N-glycosylation ofIgA1 and IgA2 have previously been monitored for 29 women during pregnancyand in the postpartum period using matrix-assisted laser desorption/ionization-Fourier-transformion-cyclotron resonance (MALDI-FTICR).13 The same MALDI-FTICR method has again been used for the analysisof plasma IgA from 284 individuals comprising both rheumatoid arthritis(RA) patients and controls.14 However,the complex and technically challenging sample handling used in thesestudies is an obstacle in large-scale clinical studies.