1. Second, Athens University Medical School, Athens, Greece.
2. Fourth Department of Internal Medicine, Athens University Medical School, Athens, Greece.
3. First Departments of Orthopaedics and the, Athens University Medical School, Athens, Greece.
4. Department of Orthopaedics, Thriasio General Hospital, Attica, Greece.
5. Department of Pathology, Sotiria General Hospital, Athens, Greece.