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Elsevier, American Journal of Cardiology, 4(45), p. 819-824, 1980

DOI: 10.1016/0002-9149(80)90127-7

Elsevier, American Journal of Cardiology, 5(42), p. 839-848, 1978

DOI: 10.1016/0002-9149(78)90105-4

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