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Kelbaek H, Nielsen BM, Eriksen J, Rabøl A, Christensen NJ, Lund JO, Bonnevie O, Munck O, Godtfredsen J.Kelbaek H, et al. Among authors: christensen nj.Br Heart J. 1987 Oct;58(4):352-7. doi: 10.1136/hrt.58.4.352.Br Heart J. 1987.PMID: 3676021Free PMC article.