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APA Citation
Ubben, T., Frerker, C., Kuck, K., & Schmidt, T. (2018). successful balloon valvuloplasty of rheumatic mitral valve stenosis in a pregnant patient without fluoroscopy: a case report. European heart journal, 2(2), 1–5. http://access.bl.uk/ark:/81055/vdc_100095532870.0x000005