The double intramedullary cortical button fixation for distal biceps tendon repair. - Siebenlist, Sebastian; Elser, Florian; Sandmann, Gunther; Buchholz, Arne; Martetschläger, Frank; Stöckle, Ulrich; Lenich, Andreas (Knee Surgery, Sports Traumatology, Arthroscopy, 2011)