[1] Carmel Med Cener, Haifa, Israel
[2] Technion Israel Inst Technol, Haifa, Israel
[3] Hosp VallHebron, Barcelona, Spain
[4] Cochin Hosp, Paris, France
[5] Papworth Hosp, Cambridge, England
[6] Sortiria Hosp, Athens, Greece
[7] Univ Edinburgh, Edinburgh, Midlothian, Scotland
[8] Royal Brompton Hosp, London, England
[9] Hosp La Fe, Valencia, Spain
[10] Hosp Clin Barcelona, Barcelona, Spain
[11] Hannover Med Sch, Hannover, Germany
[12] Milan Univ, Milan, Italy
[13] Newcastle Univ, Newcastle, Germany
[14] Hosp Trueta Girona, Girona, Spain
[15] Dundee Univ, Dundee, Scotland
[16] Univ Amsterdam, Amsterdam, Netherlands
[17] Med Ctr Alkmaar, Alkmaar, Netherlands
[18] Dundee Hosp, Dundee, Scotland
[19] Queens Univ Belfast, Belfast, Antrim, North Ireland
[20] AZ Nikolaas, St Niklaas, Belgium