1. Research Institute of Cardiology named after Levon Hovhannisyan, P. Sevak 5, Yerevan 0014, Armenia
2. Armenian Medical Association, H. Tumanyan 38/9, Yerevan 0002, Armenia
3. Imperial Clinical Trials Unit, Imperial College London, Stadium House, 68 Wood Lane, London W12 7RH, UK
4. Department of Primary Care and Public Health, Imperial College London, St Dunstan’s Road, London W6 8RP, UK
5. Department of Mathematics, Imperial College London, Huxley Building, South Kensington Campus, London SW7 2AZ, UK