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Flowchart representing the overall approach for the data analysis using univariate and multivariate joint modeling. The variable selection step is not performed for data set D. ASDAS: Ankylosing Spondylitis Disease Activity Score; BASDAI: Bath Ankylosing Spondylitis Disease Activity Index; BASFI: Bath Ankylosing Spondylitis Functional Index; CRP: C-reactive protein; ESR: erythrocyte sedimentation rate. *This model is only fitted for data set D.
