Gosens, Taco, Nicolette H M Hoefnagels, Riekie C W de Vet, Woliter J A Dhert, Evert J van Langelaan, Sjoerd K Bulstra, and Ruud G T Geesink. 2005. “The ‘Oxford Heup Score’”. Acta Orthopaedica 76 (2):204-11. https://doi.org/10.1080/00016470510030580.