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APA Citation
van der Gaag, W. H., Chiarotto, A., Heymans, M. W., Enthoven, W. T., van Rijckevorsel-Scheele, J., Bierma-Zeinstra, S. M., Bohnen, A. M., & Koes, B. W. (2021). developing clinical prediction models for nonrecovery in older patients seeking care for back pain. Pain, 162(6), . http://access.bl.uk/ark:/81055/vdc_100147208765.0x000042