[1] Univ Glasgow, Radiol, Immunol, Resp Med, Glasgow G12 0YN, Lanark, Scotland
[2] Gartnavel Royal Hosp, Glasgow G12 0YN, Lanark, Scotland
[3] Pfizer Res, Translat Med Res Collaborat, Dundee, Scotland
[4] Univ Glasgow, Robertson Ctr Biostat, Glasgow, Lanark, Scotland
[5] Pfizer Res, Translat Med Res Collaborat, Cambridge, MA USA
[6] Pfizer Res, Translat Med Res Collaborat, Collegeville, PA USA
[7] Univ Edinburgh, MRC Ctr Inflammat Res Med Phys & Clin Radiol, Edinburgh, Midlothian, Scotland