[1] Univ Maribor, Dept Family Med, Fac Med, Taborska 8, Maribor 2000, Slovenia
[2] Akershus Univ Hosp, Hlth Serv Res Unit, Lorenskog, Norway
[3] Univ Oslo, Inst Hlth & Soc, Oslo, Norway
[4] Univ Bergen, Dept Global Publ Hlth & Primary Care, Bergen, Norway
[5] Uni Res Hlth, Natl Ctr Emergency Primary Hlth Care, Bergen, Norway