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⟨Δ[HbO2]⟩ (solid red circle) and ⟨Δ[HHb]⟩ (solid blue square) as a function of ⟨ VEPrms⟩. The bars represent the standard errors (SE) evaluated over the nine subjects whereas the dashed lines represent the best linear fit of the data. Very small SE may be hidden by plot symbols.
