[1] Karolinska Inst, Dept Clin Neurosci, Div Insurance Med, Stockholm, Sweden
[2] Swedish Red Cross Univ Coll, Dept Hlth Sci, Stockholm, Sweden
[3] Uppsala Univ, Uppsala Dept Econ, Uppsala, Sweden
[4] Uppsala Univ, Ctr Labor Studies, Uppsala, Sweden
[5] Karolinska Inst, Dept Clin Neurosci, Div Neurol, Stockholm, Sweden