1. Imperial College London; School of Medicine; London UK
2. London North West University Healthcare NHS Trust; Department of Cardiology; London UK
3. Imperial College London; Department of Epidemiology and Biostatistics, School of Public Health; London UK
4. University of Ioannina School of Medicine; Department of Hygiene and Epidemiology; Ioannina Greece
5. Imperial College London; School of Public Health; London UK