[1] AstraZeneca, BioPharmaceut Med, Gaithersburg, MD USA
[2] AstraZeneca, BioPharmaceut Med, Cambridge, England
[3] Observat & Pragmat Res Inst, Singapore, Singapore
[4] Optimum Patient Care Global, Cambridge, England
[5] Univ Aberdeen, Ctr Acad Primary Care, Div Appl Hlth Sci, Aberdeen, Scotland
[6] AstraZeneca, BioPharmaceut Med, Resp & Immunol, Gaithersburg, MD USA
[7] AstraZeneca, BioPharmaceut R&D, Cambridge, England
[8] AstraZeneca, Biopharmaceut Med, Global Med Resp, Gaithersburg, MD USA
[9] Med Univ Sofia, Fac Publ Hlth, Sofia, Bulgaria
[10] Hosp Univ Lucus August, Dept Resp Med, Lugo, Spain