4 IRCCS Humanitas Research Hospital, Rozzano, Milan, Italy.
5 Department of Biomedical Sciences, Humanitas University, Pieve Emanuele, Milan, Italy.
6 Department of Orthopedic Surgery and Traumatology, Kantonsspital Baselland, Bruderholz, Switzerland.
7 Department of Clinical Research, Research Group Michael T. Hirschmann, Regenerative Medicine & Biomechanics, University of Basel, Basel, Switzerland.
8 Department of Orthopaedics, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.