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APA Citation
Fischer, G., Stieh, J., Uebing, A., Hoffmann, U., Morf, G., & Kramer, H. H. (2003). experience with transcatheter closure of secundum atrial septal defects using the Amplatzer septal occluder: a single centre study in 236 consecutive patients. Heart, 89(2), 199–204. http://access.bl.uk/ark:/81055/vdc_100135550860.0x000017