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Anker SD, Clark AL, Kemp M, Salsbury C, Teixeira MM, Hellewell PG, Coats AJ.Anker SD, et al.J Am Coll Cardiol. 1997 Oct;30(4):997-1001. doi: 10.1016/s0735-1097(97)00262-3.J Am Coll Cardiol. 1997.PMID: 9316530Free article.