Perry, DC; Bruce, CE; Pope, D; Dangerfield, P; Platt, MJ; Hall, AJ; (2012) Comorbidities in Perthes' disease: A case control study using the General Practice Research Database. The Journal of bone and joint surgery British volume, 94 (12). pp. 1684-9. ISSN 0301-620X DOI: https://doi.org/10.1302/0301-620X.94B12.29974 Full text not available from this repository.