[1] Univ Hosp Southampton NHS Fdn Trust, Southampton, Hants, England
[2] Gartnavel Royal Hosp, Glasgow, Lanark, Scotland
[3] Guys & St Thomas NHS Fdn Trust, London, England
[4] Kings Coll London, Sch Med, London, England
[5] Univ Southampton, Southampton, Hants, England
[6] VirTus Resp Res Ltd, Londonasgow, England