Authors: Valentini, G Della Rossa, A Bombardieri, S Bencivelli, W Silman, AJ D'Angelo, S Cerinic, MM Belch, JF Black, CM Bruhlmann, P Czirjak, L De Luca, A Drosos, AA Ferri, C Gabrielli, A Giacomelli, R Hayem, G Inanc, M McHugh, NJ Nielsen, H Rosada, M Scorza, R Stork, J Sysa, A van den Hoogen, FHJ Vlachoyiannopoulos, PJ

Citation: G. Valentini et al., European multicentre study to define disease activity criteria for systemic sclerosis. II. Identification of disease activity variables and development of preliminary activity indexes, ANN RHEUM D, 60(6), 2001, pp. 592-598