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APA Citation
Meltzer, R. S., Diebold, B., Valk, N. K., Blanchard, D., Guermonprez, J. L., Lancée, C. T., Peronneau, P., & Roelandt, J. (1983). correlation between velocity measurements from Doppler echocardiography and from M-mode contrast echocardiography.. Heart, 49(3), 244–249. http://access.bl.uk/ark:/81055/vdc_100144236509.0x00002e