Adverse tissue reactions to wear particles from Co-alloy articulations, increased by alumina-blasting particle contamination from cementless Ti-based total hip implants. A report of seven revisions with early failure. - Böhler,M.; Kanz,F.; Schwarz,B.; Steffan,I.; Walter,A.; Plenk,H.; Knahr,K. (J Bone Joint Surg [Br], 2002)