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APA Citation
Vanderschueren, D., Decramer, M., Van den Daele, P., & Dequeker, J. (1989). pulmonary function and maximal transrespiratory pressures in ankylosing spondylitis.. Annals of the rheumatic diseases, 48(8), 632–635. http://access.bl.uk/ark:/81055/vdc_100135157255.0x000052