[1] Family Fed Finland, Dept Med Genet, Helsinki, Finland
[2] Oulu Deaconess Inst, Osteoporosis Clin, Oulu, Finland
[3] Univ Turku, Dept Anat, Turku, Finland
[4] Univ Oulu, Dept Anat & Cell Biol, Oulu, Finland
[5] Univ Turku, Dept Med Biochem, Turku, Finland