1. 2nd Department of Urology, Aristotle University of Thessaloniki, General Hospital ‘Papageorgiou’ Thessaloniki Greece
2. Laboratory of Biological Chemistry, School of Medicine Aristotle University of Thessaloniki Thessaloniki Greece
3. General (Internal) Medicine Department, Dartford and Gravesham NHS Trust Dartford UK
4. Laboratory of Hygiene, Social & Preventive Medicine and Medical Statistics, School of Medicine Aristotle University of Thessaloniki Thessaloniki Greece