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Paul VE, Farrell T, Gill J, Davies DW, Ward DE, Camm AJ.Paul VE, et al.Pacing Clin Electrophysiol. 1991 Aug;14(8):1265-73. doi: 10.1111/j.1540-8159.1991.tb02866.x.Pacing Clin Electrophysiol. 1991.PMID: 1719504