[1] Karolinska Inst, Danderyd Hosp, Dept Orthopaed, SE-18288 Danderyd, Sweden
[2] Karolinska Inst, Danderyd Hosp, Dept Geriatr, SE-18288 Danderyd, Sweden
[3] Karolinska Inst, Danderyd Hosp, Dept Clin Chem, SE-18288 Danderyd, Sweden
[4] Karolinska Inst, Danderyd Hosp, Dept Radiol, SE-18288 Danderyd, Sweden