Digital ulcers and cutaneous subsets of systemic sclerosis: Clinical, immunological, nailfold capillaroscopy, and survival differences in the Spanish RESCLE Registry - Tolosa-Vilella C.; Morera-Morales M.; Simeón-Aznar C.; Marí-Alfonso B.; Colunga-Arguelles D.; Callejas Rubio J.; Rubio-Rivas M.; Freire-Dapena M.; Guillén-del Castillo A.; Iniesta-Arandia N.; Castillo-Palma M.; Egurbide-Arberas M.; et al. (SEMINARS IN ARTHRITIS AND RHEUMATISM, 2016)