Fig. A.1

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Model comparison for visits 1, 2, and 3. The x-axis represents the systematic error model where 1 designates a constant, θn a polynomial order n of θ, and ϕm a polynomial order m of ϕ. The best model is circled. For one model to be considered better than another, we require that the AIC difference between it and the others be greater than 20.
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