[1] Univ Copenhagen, Fac Hlth Sci, Dept Publ Hlth, Ctr Res & Educ Gen Practice, DK-1014 Copenhagen, Denmark
[2] Primary Hlth Care Res Unit, Reg Zealand, Copenhagen, Denmark
[3] Dartmouth Med Sch, Ctr Med & Media, Dartmouth Inst Hlth Policy & Clin Practice, Lebanon, NH USA
[4] Univ Oxford, Ctr Evidence Based Med, Nuffield Dept Primary Care Hlth Sci, Oxford, England