Salazar GA, Assassi S, Wigley F, et al. Antinuclear antibody-negative systemic sclerosis. Semin Arthritis Rheum. 2015;44(6):680-686.

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Salazar GA, Assassi S, Wigley F, et al. Antinuclear antibody-negative systemic sclerosis. Semin Arthritis Rheum. 2015;44(6):680-686.