tokens: Serum concentrations of bone specific alkaline phosphatase ( BALP ) and osteocalcin ( bone Gla protein , BGP ) , urinary levels of pyridinoline ( Pyr ) and deoxypyridinoline ( Dpyr ) and computed tomography ( CT ) measurements of the cross-sectional areas of the vertebrae and the femurs , the apparent density of cancellous bone in the vertebrae , and the volume and the material density of cortical bone in the femurs were determined in 126 boys and 143 girls , ages 7-18 years .
folded_tokens: serum concentration of bone specific alkaline phosphatase ( balp ) and osteocalcin ( bone glum protein , bgp ) , urinary level of pyridinoline ( pyr ) and deoxypyridinoline ( dpyr ) and compute tomography ( ct ) measurement of the cross-sectional area of the vertebra and the femur , the apparent density of cancellous bone in the vertebra , and the volume and the material density of cortical bone in the femur be determine in 126 boy and 143 girl , age 7-18 year .