Supplemental Material for Incidence and risk factors of osteomyelitis in adult and pediatric systemic lupus erythematosus: a nationwide, population-based cohort study by Y.F. Huang, Y.S. Chang, W.S. Chen, Y.P. Tsao, W.H. Wang, H.T. Liao, C.Y. Tsai and C.C. Lai in Lupus