Erratum to: Transfemoral aortic valve implantation: procedural hospital volume and mortality in Germany

F Macheret, D Heublein, L Costello-Boerrigter, G Boerrigter, P Mckie, D Bellavia, H Chen, S Wan, S Iyer, V Cannone, S Sangaralingham, J Nuetel, M Volpe, G Gallo, S Rubattu, R Altara, Gjj Da Silva, M Frisk, F Spelta, F Zouein, W Louch, D Newby, T Mcdonagh, P Currie, D Northridge, N Boon, H Dargie, M Packer, R Califf, M Konstam, H Krum, J Mcmurray, J Rouleau, A Parvanova, I Van Der Meer, I Iliev, A Perna, F Gaspari, R Trevisan, J Burnett, J Korinek, K Nogi, T Ueda, Y Matsue, M Nogi, S Ishihara, Y Nakada, C Lee, B Huntley, D Mccormick, T Ichiki, S Sangaralingham, O Lisy, M Chan, Y Qi, K Larimore, A Cherukuri, L Seid, K Jayaram, S Pan, H Chen, D Dickey, G Boerrigter, C Lee, L Kleppe, S Sangaralingham, M Kuhn, V Cannone, H Chen, J Burnett, T Ichiki, A Jinno, Y Tsuji, S Sangaralingham, K Whig, S Peddibhotla, R Kirby, H Sessions, P Maloney, P Armstrong, B Pieske, K Anstrom, J Ezekowitz, A Hernandez, J Butler, P Schmidt, M Schramm, H Schroder, J Stasch