[1] Univ Gothenburg, Sahlgrenska Acad, Inst Hlth & Care Sci, Gothenburg, Sweden
[2] Univ Gothenburg, Ctr Person Ctr Care GPCC, Gothenburg, Sweden
[3] Narhalsan Res & Dev Primary Hlth Care, Gothenburg, Sweden
[4] Univ Gothenburg, Sahlgrenska Acad, Inst Med, Dept Resp Med & Allergol, Gothenburg, Sweden
[5] Res & Dev Dept, Halmstad, Sweden
[6] Univ Gothenburg, Sahlgrenska Acad, Dept Mol & Clin Med, Gothenburg, Sweden
[7] Univ Gothenburg, Dept Educ Commun & Learning, Gothenburg, Sweden
[8] Imperial Coll, Natl Heart & Lung Inst, London, England