Burkhardt, Melanie A
Waser, Jasmin
Milleret, Vincent
Gerber, Isabel
Emmert, Maximilian Y
Foolen, Jasper
Hoerstrup, Simon P
Schlottig, Falko
Vogel, Viola
Article History
Received: 23 July 2015
Accepted: 18 January 2016
First Online: 17 February 2016
Competing interests
: J.W. is and F.S. was employed by Thommen Medical AG. Ti discs have been provided by Thommen Medical AG. All other authors declare no competing financial interests.