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Extended report
ASAS modification of the Berlin algorithm for diagnosing axial spondyloarthritis: results from the SPondyloArthritis Caught Early (SPACE)-cohort and from the Assessment of SpondyloArthritis international Society (ASAS)-cohort
  1. Rosaline van den Berg1,
  2. Manouk de Hooge1,
  3. Martin Rudwaleit2,
  4. Joachim Sieper3,
  5. Floris van Gaalen1,
  6. Monique Reijnierse4,
  7. Robert Landewé5,
  8. Tom Huizinga1,
  9. Désirée van der Heijde1
  1. 1Department of Rheumatology, Leiden University Medical Center, Leiden, the Netherlands
  2. 2Department of Medicine, Endokrinologikum Berlin, and Charité University Medicine, Berlin, Germany
  3. 3Rheumatology Unit, Charité Medical University, Germany
  4. 4Department of Radiology, Leiden University Medical Center, Leiden, the Netherlands
  5. 5Department of Medicine, Division of Rheumatology, Academic Medical Center, Amsterdam, The Netherlands
  1. Correspondence to Professor Désirée van der Heijde, Department of Rheumatology, Leiden University Medical Center,P.O. Box 9600, 2300 RC Leiden, The Netherlands; mail{at}

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