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-VLRQ 4 ALRR-ALHQ, ALRR-AFRQ, ALHQ- 3 ALRQ, AFRQ-ALRQ 5 ALHQ-ALHQ, ALHQ-AFRQ, AFRQ- 4 AFRQ * Groups showed homogeneous odds ratios for atypical scrapie.