[1] Perugia Hosp, Perugia, Italy
[2] Fac Hosp Bulovka, Prague, Czech Republic
[3] Hosp Grosshansdorf, Grosshansdorf, Germany
[4] Fac Hosp, Plzen, Czech Republic
[5] Birmingham Heart England Hosp, Birmingham, W Midlands, England
[6] Cambridge Univ Hosp NHS Trust, Cambridge, England
[7] AstraZeneca, Macclesfield, Cheshire, England
[8] Univ Hosp Birmingham, Birmingham, W Midlands, England