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Developmental changes in sleep EEG relative spectral power. Developmental trajectories with 95 % confidence intervals of the mean, produced by averaging sleep estimates across individuals within 3-year nonoverlapping windows from 2.5 to 17.5 years in NCH databank and 2-year nonoverlapping windows from 4.5 to 10 years in CHAT) for relative across sleep stages (N2, N3, R, rows), bands (columns) and channels.
