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Hant FN, Ludwicka-Bradley A, Wang HJ, Li N, Elashoff R, Tashkin DP, Silver RM; Scleroderma Lung Study Research Group.Hant FN, et al. Among authors: ludwicka bradley a.J Rheumatol. 2009 Apr;36(4):773-80. doi: 10.3899/jrheum.080633. Epub 2009 Mar 13.J Rheumatol. 2009.PMID: 19286849