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APA Citation
Fraser, A. G., Monaghan, M. J., van der Steen, A. F. W., & Sutherland, G. R. (2022). a concise history of echocardiography: timeline, pioneers, and landmark publications . European heart journal, 23, 1130–1143. http://access.bl.uk/ark:/81055/vdc_100161164202.0x00000a