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DeGroot J, Verzijl N, Wenting-van Wijk MJ, Jacobs KM, Van El B, Van Roermund PM, Bank RA, Bijlsma JW, TeKoppele JM, Lafeber FP.DeGroot J, et al. Among authors: lafeber fp.Arthritis Rheum. 2004 Apr;50(4):1207-15. doi: 10.1002/art.20170.Arthritis Rheum. 2004.PMID: 15077303Free article.