@article{article46a27acb,
title   = {Osteoprotegerin/RANKL system imbalance in active polyarticular-onset juvenile idiopathic arthritis: a bone damage biomarker?},
author = {Spelling, P. and Bonfá, E and Pereira, R. M. R.},
year = {2008},
doi = {10.1080/03009740802116224},
journal   = {Scandinavian Journal of Rheumatology}
}