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O.M. Rennert. M.D., Department of Pediatrics, Box 1296, University of Florida College of Medicine, Gainesville, Fla 32610 (USA)
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Friedman, W., Sahn, D. & Hirscklau, M. A Review: Newer, Noninvasive Cardiac Diagnostic Methods. Pediatr Res 11, 190–197 (1977). https://doi.org/10.1203/00006450-197703000-00010
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DOI: https://doi.org/10.1203/00006450-197703000-00010
