[1] Univ London Imperial Coll Sci Technol & Med, Dept Biol Sci, Sect Immunol & Infect, London SW7 2AZ, England
[2] Univ Edinburgh, MRC, Ctr Inflammat Res, Immunobiol Grp, Edinburgh EH8 9YL, Midlothian, Scotland
[3] GlaxoSmithKline, Translat Med & Genet, Greenford, Middx, England