Multicenter,Single-arm Study to Evaluate Efficacy, Safety, & Pharmacokinetics of Denosumab in Children w/ OI

To evaluate the effect of denosumab in lumbar spine bone mineral density (BMD) Z-score at 12 months, as assessed by dual-energy X-ray absorptiometry (DXA), in children 2 to 17 years of age (at the time of screening) on a 3-Month Dosing Regimen with osteogenesis imperfecta (OI)