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Phase 2 TLD-based testing: Measured doses relative to 1 & 4 Gy target doses for each participating laboratory. (Plotted doses are averages of measured doses with standard deviations generally ≤ 0.05, except for SDs of 1 Gy Lab #3 value of 1.99 and 4 Gy Lab #1 value of 0.55, Lab #3 of 1.05 and Lab #7 of 0.06).
