Kapoor, B., Dunlop, C., Wynn-Jones, C., Fryer, A. A., Strange, R. C., & Maffulli, N. (2007). Vitamin D and oestrogen receptor polymorphisms in developmental dysplasia of the hip and primary protrusio acetabuli – A preliminary study. Journal of Negative Results in BioMedicine, 6, Article 7. https://doi.org/10.1186/1477-5751-6-7