Ann Rheum Dis. 2005 May; 64(5): 659–663.
Early referral recommendations for ankylosing spondylitis (including pre-radiographic and radiographic forms) in primary care
Medical Department I, Rheumatology, Charitè, University Medicine Berlin, Germany. Email: joachim.sieper/at/charite.de
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Parameters suitable for screening and early referral of patients with low back pain with axial SpA by primary care physicians to a rheumatologist.