[1] Univ Copenhagen, Herlev & Gentofte Hosp, Dept Clin Microbiol, Herlev, Denmark
[2] Univ Copenhagen, Dept Publ Hlth, Sect Gen Practice, Copenhagen, Denmark
[3] Univ Copenhagen, Dept Publ Hlth, Res Unit Gen Practice, Copenhagen, Denmark
[4] Aalborg Univ, Dept Clin Med, Res Unit Gen Practice, Aalborg, Denmark
[5] Univ Southern Denmark, Dept Publ Hlth, Audit Project Odense, Odense, Denmark