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Degradation of neurobehavioral performance over 6 successive extended duration shifts on a 21-day rotation. Change in mean PVT reaction time (RT) (A), number of lapses (B), and slowest 10% RTs (C) from EDWS1 to EDWS6. Post hoc differences are shown (***P < 0.0005; **P < 0.001; *P < 0.005).Mean ± standard error of the mean reported, n = 31.
