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Arntd, U; Behrens, F; Ziswiler, HR; Kaltwasser, JP; Möller, B (2007). Oberservational study of a patient and doctor directed pre-referral questionnarie for an early arthritis clinic. Rheumatology international, 28(1), pp. 21-26. Berlin: Springer-Verlag 10.1007/s00296-007-0382-x
