1. Department of Human Dynamics, University of Chieti, Italy
2. Neurosurgery Division, University of L'Aquila, Italy
3. School of Dentistry, University of Chieti, Italy
4. Department of Clinical Psychology, University of Chieti, Italy
5. Orthopaedics Division, University of Perugia, Perugia, Italy
6. Vasto Hospital, Chieti, Italy
7. Institute of Internal Medicine, Catholic University, Rome, Italy
8. Department of Pharmacology and Experimental Therapeutics, Biochemistry and Internal Medicine Tufts University School of Medicine, Tufts-New England Medical Center, Boston, MA, USA
9. Department of Medicine, Boston University School of Medicine, Boston, MA, USA