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Reversal intervals. A, Reversal interval histogram for first reversal. Gray line indicates the fitted lognormal distribution. Mean = 4.04; SD = 0.67. B, Reversal interval histogram for subsequent reversals. The gray line indicates a lognormal fit. Mean = 2.55; SD = 1.18. C, Hazard function. The probability of reversal as a function of time from beginning of assay (first reversal interval) or completion of last reversal (second reversal interval) estimated from the lognormal fit.
