[1] Univ Birmingham, Coll Med & Dent Sci, Inst Appl Hlth Res, Birmingham Clin Trials Unit, Birmingham B15 2TT, W Midlands, England
[2] Birmingham Womens Hosp, Birmingham, W Midlands, England
[3] Chelsea & Westminster Hosp, London, England
[4] Derriford Hosp, Plymouth, Devon, England
[5] Homerton Univ Hosp, London, England
[6] Lancashire Women & Newborn Ctr, Burnley, Lancs, England
[7] Liverpool Womens Hosp, Liverpool, Merseyside, England
[8] Northwick Pk Hosp & Clin Res Ctr, Harrow, Middx, England
[9] City Hosp Nottingham, Nottingham, England
[10] Princess Anne Hosp, Southampton, Hants, England
[11] Princess Royal Hosp, Orpington, England
[12] Queen Alexandra Hosp, London, England
[13] Queens Med Ctr, London, England
[14] Rotunda Hosp, Dublin, Ireland
[15] Royal Blackburn Hosp, Blackburn, Lancs, England
[16] Royal Bolton Hosp, Farnworth, England
[17] Royal Derby Hosp, Derby, England
[18] Southern Gen Hosp, Glasgow, Lanark, Scotland
[19] St Marys Hosp, London, England
[20] Stoke Mandeville Hosp, Aylesbury, Bucks, England
[21] Univ Coll London Hosp, London, England
[22] Univ Hosp Coventry & Warwickshire, Coventry, W Midlands, England
[23] Univ Hosp North Staffordshire, Stoke On Trent, Staffs, England
[24] Warrington Hosp, Warrington, Cheshire, England
[25] Warwick Hosp, Warwick, England