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Nikiphorou, Elena, Pedro D. Carvalho, Annelies Boonen, Bruno Fautrel, Pascal Richette, Pedro M. Machado, Desirée van der Heijde, Robert Landewé, e Sofia Ramiro. "Sick Leave in Early Axial Spondyloarthritis: The Role of Clinical and Socioeconomic Factors. Five-year Data From the DESIR Cohort." RMD Open 2021.

Nikiphorou, Elena, et al. "Sick Leave in Early Axial Spondyloarthritis: The Role of Clinical and Socioeconomic Factors. Five-year Data From the DESIR Cohort." RMD Open 2021.