Letter

Tumour necrosis factor receptor-associated periodic syndrome caused by a rare mutation in the TNFRSF1A gene, and with excellent response to etanercept treatment

L. Cantarini, O.M. Lucherini, M. Galeazzi, F. Fanti, G. Simonini, C.T. Baldari, F. Laghi Pasini, M. De Martino, R. Cimaz