Erratum to: The failure mode of two reabsorbable fixation systems: Swivelock with Fibertape versus Bio-Corkscrew with Fiberwire in bovine rotator cuff. - Carli, Angelo; Lanzetti, Riccardo; Monaco, Edoardo; Labianca, Luca; Mossa, Luigi; Ferretti, Andrea (Journal of orthopaedic science: official journal of the Japanese Orthopaedic Association, 2012)