1. Department of Internal Medicine, School of Medicine, University of Ioannina, Ioannina 45110, Greece
2. Department of General Medicine, Lipid Clinic, Addenbrooke’s Hospital, Cambridge University Hospitals NHS Foundation Trust, Cambridge, UK
3. Department of Clinical Biochemistry, Royal Free Hospital Campus, University College London Medical School, University College London (UCL), London NW3 2QG, UK