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Clarke error grid analyses. Upper panels: prediction models including the GH peak; lower panels: prediction models without GH peak. Zone A: difference between predicted and actual nFAH SDS <0.5. Zone B: difference between predicted and actual nFAH SDS 0.5-1.0. Zone C: difference between predicted and actual nFAH SDS >1.0. All SDS calculations are based on Prader et al. [12].
