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APA Citation
Rethlefsen, S. A., Barrett, K. K., Wren, T. A. L., Blumstein, G., Gargiulo, D., Ryan, D. D., & Kay, R. M. (2017). reliability of patellar height indices in children with cerebral palsy and spina bifida. Journal of children's orthopaedics, 11, 249–255. http://access.bl.uk/ark:/81055/vdc_100143794136.0x000018