[1] Optimal Renal Care UK, Birmingham, W Midlands, England
[2] Royal Free Hosp, London NW3 2QG, England
[3] Queen Alexandra Hosp, Portsmouth, Hants, England
[4] Hope Hosp, Salford M6 8HD, Lancs, England
[5] Leicester Gen Hosp, Leicester LE5 4PW, Leics, England
[6] Fresenius Med Care, Bad Homburg, Germany