[1] UCL, Div Infect & Immun, Cruciform Bldg,Gower St, London WC1E 6BT, England
[2] Natl Inst Biol Stand & Controls, Div Virol, Potters Bar EN6 3QG, Herts, England
[3] NHS Fdn Trust, Microbiol Virol & Infect Control, Great Ormond St Hosp Children, London WC1N 3JH, England
[4] NHS Fdn Trust, Dept Immunol, Great Ormond St Hosp, London WC1N 3JH, England
[5] NHS Fdn Trust, Dept Radiol, Great Ormond St Hosp Children, London WC1N 3JH, England
[6] Boston Univ, Sch Med, Dept Microbiol, Boston, MA 02118 USA
[7] UCL Great Ormond St Inst Child Hlth, Genet & Genom Med, London WC1N 1EH, England
[8] NHS Fdn Trust, Dept Histopathol, Great Ormond St Hosp Children, London WC1N 3JH, England
[9] NHS Fdn Trust, Dept Neurosci, Great Ormond St Hosp, London WC1N 3JH, England
[10] Queens Univ Belfast, Mol Pathol Programme, Ctr Canc Res & Cell Biol, Belfast, Antrim, North Ireland
[11] Belfast Hlth & Social Care Trust, Tissue Pathol, Belfast City Hosp, Lisburn Rd, Belfast, Antrim, North Ireland
[12] Nottingham Univ Hosp NHS Trust, Queens Med Ctr, Nottingham NG7 2UH, England
[13] UCL, UCL Genet Inst, London WC1E 6BT, England
[14] UCL Great Ormond St Inst Child Hlth, Mol & Cellular Immunol Sect, London WC1N 1EH, England
[15] UCL Great Ormond St Inst Child Hlth, Dev Biol & Canc Programme, London WC1N 1EH, England
[16] NHS Fdn Trust, Great Ormond St Hosp Children, Mol & Cellular Immunol, London WC1N 3JH, England
[17] UCL Great Ormond St Inst Child Hlth, London WC1N 1EH, England