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APA Citation
Prochownik, P., Przewlocki, T., Sobien, B., Gancarczyk, U., Olszowska, M., Podolec, P., & Komar, M. (n.d.). the benefit of atrial septal defect closure in the elderly patients. European heart journal, 41, . http://access.bl.uk/ark:/81055/vdc_100117807918.0x000036