1. Cardiology Clinic, General Hospital of Larisa, Larisa, Greece
2. Fourth Department of Obstetrics and Gynecology, Medical School, Aristotle University of Thessaloniki, Hippokration Hospital, Thessaloniki, Greece
3. Second Propedeutic Department of Internal Medicine, Medical School, Aristotle University of Thessaloniki, Hippokration Hospital, Thessaloniki, Greece
4. Department of Clinical Biochemistry (Vascular Prevention Clinic), Royal Free Hospital Campus, University College Medical School, University College London, London, UK,