[1] Nordsjaellands Hosp, Dept Pulm & Infect Dis, Hillerod, Denmark
[2] Family Med Res Ctr, Orebro, Sweden
[3] Orebro Univ, Sch Hlth & Med Sci, Orebro, Sweden
[4] Univ Hosp Ctr Hlth Res, Copenhagen, Denmark
[5] Rigshosp, Inst Publ Hlth, Copenhagen Univ Hosp, Copenhagen, Denmark
[6] Univ Copenhagen, Copenhagen, Denmark
[7] Aarhus Univ, Fac Hlth Sci, Dept Clin Med, Aarhus, Denmark
[8] Aarhus Univ, Dept Publ Hlth, Sect Nursing, Aarhus, Denmark
[9] Metropolitan Univ Coll, Dept Nursing, Copenhagen, Denmark