Single cut distal femoral osteotomy for correction of femoral torsion and valgus malformity in patellofemoral malalignment - proof of application of new trigonometrical calculation... oleh Florian B. Imhoff, Joscha Schnell, Alejandro Magaña, Theresa Diermeier, Bastian Scheiderer, Sepp Braun, Andreas B. Imhoff, Robert A. Arciero, Knut Beitzel