[1] Aarhus Univ Hosp, Dept Internal Med, Aarhus, Denmark
[2] Aarhus Univ Hosp, Dept Anaesthesiol, Aarhus, Denmark
[3] Aarhus Univ, Inst Publ Hlth, Dept Nursing Sci, Aarhus, Denmark
[4] Aarhus Univ Hosp, Aarhus, Denmark
[5] Aarhus Univ Hosp, Dept Anaesthesiol, Aarhus, Denmark
[6] Aarhus Univ Hosp, Danish Pain Res Ctr, Aarhus, Denmark