1. Department of Dermatology, University of Rome Tor Vergata, Rome, Italy
2. Physiology Department, School of Medicine, Aristotle University of Thessaloniki, Greece
3. Department of Orthopaedics, Catholic University of Rome, Rome, Italy
4. School of Dentistry, University of Chieti, Italy
5. Orthopaedics Division, University of Chieti, Chieti, Italy
6. Orthopaedics Division, University of Perugia, Perugia, Italy
7. Department of Oncology and Experimental Medicine, University of Chieti, Chieti, Italy
8. Department of Medicine, Boston University School of Medicine, Boston, MA, USA