Pedersen, A. et al. 2004. Registration in the Danish Hip Arthroplasty RegistryCompleteness of total hip arthroplasties and positive predictive value of registered diagnosis and postoperative complications. Acta Orthopaedica. 75, 4 (Jan. 2004), 434–441. DOI:https://doi.org/10.1080/00016470410001213-1.