1. University of Bern; Institute of Social and Preventive Medicine; Niesenweg 6 Bern Switzerland CH-3012
2. Carol Davila University of Medicine and Pharmacy, Colentina Clinical Hospital; Department of Cardiology; 19-21, Stefan cel Mare Bucharest Romania 020142
3. St George's, University of London; Population Health Sciences Institute; Cranmer Terrace London UK SW17 0RE