Association between severity of PF and survival in patients with SSc. FVC, forced vital capacity; PF, pulmonary fibrosis; SSc, systemic sclerosis. Reproduced with permission from Steen et al. Arthritis Rheum 1994 © John Wiley & Sons/American College of Rheumatology .
Matucci-Cerinic et al. Arthritis Research & Therapy 2007 9(Suppl 2):S7 doi:10.1186/ar2191