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Soluble receptor activator of nuclear factor κB ligand/osteoprotegerin ratio is increased in systemic lupus erythematosus patients

Diana Carmona-Fernandes, Maria José Santos, Inês Pedro Perpétuo, João Eurico Fonseca and Helena Canhão*

Arthritis Research & Therapy 2011, 13:R175  doi:10.1186/ar3500