1. Orthopedics Traumatology and Rehabilitation Unit Polyclinic "G.B. Morgagni" Mediterranean Foundation Catania Italy
2. Human, Histology and Movement Science Section Department of Biomedical and Biotechnological Sciences University of Catania Catania Italy
3. Research Center on Motor Activities (CRAM) University of Catania Catania Italy
4. Department of Biology College of Science and Technology Sbarro Institute for Cancer Research and Molecular Medicine Temple University Philadelphia PA USA