Corrigendum to 'Intraprosthetic screw fixation increases primary fixation stability in periprosthetic fractures of the femur—A biomechanical study.' [Med. Eng. Phys. 36 (2014) 239–243]. Issue 6 (June 2016) - Brand, Stephan; Klotz, Johannes; Hassel, Thomas; Petri, Maximilian; Ettinger, Max; Bach, Friedrich-Wilhelm; Krettek, Christian; Gösling, Thomas