Incidence rates of autoimmune diseases in European healthcare databases: a contribution of the ADVANCE project by Willame, C, Dodd, C, van der Aa, L, Picelli, G, Emborg, H-D, Kahlert, J, Gini, R, Huerta, C, Martín-Merino, E, McGee, C, de Lusignan, S, Roberto, G, Villa, M, Weibel, D, Titievsky, L, Sturkenboom, MCJM