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APA Citation
Ennis, H., Vail, A., Wragg, E., Taylor, A., Moore, T., Murray, A., Muir, L., Griffiths, C., & Herrick, A. (2013). a prospective study of systemic sclerosis-related digital ulcers: prevalence, location, and functional impact. Scandinavian journal of rheumatology, 42, 483–486. http://access.bl.uk/ark:/81055/vdc_100024579919.0x000006