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REFERENCE:
Prineas, R. J., Crow, R. S., & Blackburn, H. W. (1982). The Minnesota code manual of electrocardiographic findings: standards and procedures for measurement and classification. Boston, Mass: J. Wright.
Prineas RJ, Crow RS, Zhang Z-M. The Minnesota Code Manual of Electrocardiographic findings. Springer Science & Business Media; 2009.