Bone metabolism evaluation.
DXA: Dual-energy X-ray absorptiometry: measurement of bone mineral density (BMD): lumbar spine, hip, wrist, total body;
QUS: Quantitative Ultrasound: heel, finger;
pQCT: Peripheral Quantitative Computed Tomography: leg, wrist;
QCT: Quantitative Computed Tomography: spine;
VFA: DXA Vertebral Fracture Assessment (VFA).