[1] Univ Hasselt, Fac Med & Life Sci, Hasselt, Belgium
[2] Clin Marignane, Marseille, France
[3] Vrije Univ Amsterdam Med Ctr, Amsterdam, Netherlands
[4] Belfast City Hosp, Belfast BT9 7AD, Antrim, North Ireland
[5] Grp Hosp Mutualiste, Grenoble, France
[6] Univ Med Ctr Utrecht, Utrecht, Netherlands
[7] Royal Infirm Edinburgh NHS Trust, Edinburgh, Midlothian, Scotland
[8] Nouvelles Clin Nantaises, Nantes, France
[9] Univ Ziekenhuis Brussels, Brussels, Belgium
[10] Morriston Hosp, Swansea, W Glam, Wales
[11] Univ Nottingham Hosp, Nottingham NG7 2UH, England
[12] Univ Hosp Bristol, Bristol, Avon, England
[13] Ninewells Hosp, Dundee DD1 9SY, Scotland
[14] Freeman Hosp Newcastle, Newcastle Upon Tyne, Tyne & Wear, England
[15] Golden Jubilee Hosp, Glasgow, Lanark, Scotland
[16] Basildon Univ Hosp, Basildon, England
[17] Clin Orangerie, Strasbourg, France
[18] Ziekenhuis Oost Limburg, Genk, Belgium