From the Division of Health and Social Care (P.U.H., A.P.G., A.M.T., C.D.A.W.), King’s College London, London, UK; Guy’s and St. Thomas’ Foundation Trust (A.G.R.), St. Thomas’ Hospital, London, UK; and NIHR Biomedical Research Centre Guy’s & St Thomas’ NHS Foundation Trust and King’s College London (C.D.A.W.), London, UK. (At 2008-08)