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Number of surgical procedures linked to cases of dura mater graft-associated Creutzfeldt-Jakob disease (dCJD),* by year of surgical procedure — Japan, 1975–1993†
* Among 154 dura mater graft procedures, the brand was documented as Lyodura in 140 (91%).
† The manufacturer of Lyodura reported that it revised its collection and processing procedures in May 1987 to reduce the risk for CJD contamination; the recommended shelf life for Lyodura was 5 years.
