?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aulast=Bertazzo&rft.aufirst=S&rft.au=Bertazzo%2C+S&rft.issue=16&rft.title=European+Heart+Journal&rft.issn=1522-9645&rft.pages=1189-1193&rft.date=21+April+2017&rft.atitle=Aortic+valve+calcification%3A+a+bone+of+contention&rft.volume=38&rft.genre=article