[1] Washington Univ, Sch Med, Dept Med, Div Bone & Mineral Dis, St Louis, MO 63110 USA
[2] Washington Univ, Sch Med, Dept Pathol & Immunol, Div Anat & Mol Pathol, St Louis, MO 63110 USA
[3] Univ Erlangen Nurnberg, Dept Internal Med 3, Rheumatol & Immunol, Erlangen, Germany