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APA Citation
Berger, M., Kumowski, N., Straw, S., Verket, M., Marx, N., Witte, K. K., & Schuett, K. (n.d.). clinical implications and risk factors for QRS width progression in heart failure patients. European heart journal, 43, . http://access.bl.uk/ark:/81055/vdc_100168330208.0x00001b