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