Cited 22 times since 2009 (1.5 per year) source: Scopus JACC. Cardiovascular imaging, Volume 2, Issue 4, 1 1 2009, Pages 522-523 Percutaneous valve-in-valve procedure for severe paravalvular regurgitation in aortic bioprosthesis. Ng AC, van der Kley F, Delgado V, Shanks M, van Bommel RJ, de Weger A, Tavilla G, Holman ER, Schuijf JD, van de Veire NR, Schalij MJ, Bax JJ