(1)
Espehaug, B.; Havelin, L. I.; Engesaeter, L. B.; Vollset, S. E. The Effect of Hospital-Type and Operating Volume on the Survival of Hip Replacements: A Review of 39,505 Primary Total Hip Replacements Reported to the Norwegian Arthroplasty Register, 1988-1996. ActaO 1999, 70, 12-18.