Iervolino, S., Lofrano, M., Di Minno, M., Foglia, F., Scarpa, R. and Peluso, R. 2012. IgA deficiency evidence after anti-TNF-α treatment in a psoriatic arthritis patient: case report. Reumatismo. 64, 1 (Mar. 2012), 40–43. DOI:https://doi.org/10.4081/reumatismo.2012.40.