M. Heliövaara, M. Mäkelä, O. Impivaara, P. Knekt, A. Aromaa, and K. Sievers, “Association of overweight, trauma and workload with coxarthrosis: A health survey of 7,217 persons”, ActaO, vol. 64, no. 5, pp. 513–518, Jan. 1993.