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APA Citation
Drosos, A. A., Tsiakou, E. K., Tsifetaki, N., Politi, E. N., & Siamopoulou-Mavridou, A. (1997). subgroups of primary Sjögren's syndrome. Sjögren's syndrome in male and paediatric Greek patients. Annals of the rheumatic diseases, 56(5), 333–335. http://access.bl.uk/ark:/81055/vdc_100135135685.0x00005b