1. Department of Biomedical and Neuromotor SciencesUniversity of Bologna Bologna Italy
2. CNR Institute of Molecular Genetics “Luigi Luca Cavalli‐Sforza” Bologna Italy
3. IRCCS Istituto Ortopedico Rizzoli Bologna Italy
4. Department of Morphology, Surgery and Experimental MedicineUniversity of Ferrara Ferrara Italy
5. LTTA—Electron Microscopy CenterUniversity of Ferrara Ferrara Italy