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Ender, Joerg; Erdoes, Gabor; Krohmer, Eugen; Olthoff, Derk; Mukherjee, Chirojit (2009). Transesophageal echocardiography for verification of the position of the electrocardiographically-placed central venous catheter. Journal of cardiothoracic and vascular anesthesia, 23(4), pp. 457-61. New York, N.Y.: Elsevier 10.1053/j.jvca.2008.12.003
