[1] Univ Southern Denmark, Natl Inst Publ Hlth, Ctr Intervent Res, Oster Farimagsgade 5A,2, DK-1353 Copenhagen, Denmark
[2] Univ Southern Denmark, Odense Univ Hosp, Dept Oncol, Danish Knowledge Ctr Rehabil & Palliat Care, Vestergade 17, DK-5800 Nyborg, Denmark
[3] Univ Southern Denmark, Dept Clin Res, Vestergade 17, DK-5800 Nyborg, Denmark
[4] Copenhagen Univ Hosp Gentofte, Dept Cardiol, Kildegardsvej 28, DK-2900 Gentofte, Denmark
[5] Duke Clin Res Inst, 2400 Pratt St, Durham, NC 27705 USA
[6] Univ Copenhagen, Capital Reg Denmark, Emergency Med Serv, DK-2750 Ballerup, Denmark
[7] Aalborg Univ Hosp, Dept Clin Epidemiol, DK-9000 Aalborg, Denmark