A. Aamodt, L. Nordsletten, L. Havelin, K. Indrekvam, S. E. Utvåg, and K. H. Sundberg, “Documentation of hip prostheses used in NorwayA critical review of the literature from 1996–2000”, ActaO, vol. 75, no. 6, pp. 663–676, Jan. 2004.