Derakhshan, MH, Goodson, NJ, Packham, J, Sengupta, R, Marzo-Ortega, H, Molto, A, Siebert, S, "AB0727 Hip osteoporosis and vertebral fractures are associated with younger age at diagnosis of spondyloarthritis: results from the comospa study", Annals of the Rheumatic Diseases,