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Prior balloon valvuloplasty versus DIRECT transcatheter Aortic Valve Implantation (DIRECTAVI): study protocol for a randomized controlled trial

Crossref DOI link: https://doi.org/10.1186/s13063-017-2036-y

Published Online: 2017-07-04

Published Print: 2017-12

Update policy: https://doi.org/10.1007/springer_crossmark_policy

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