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Cumulative temporal errors from S1 who administered a single sequence of AIH with the ‘manual’ delivery system. The plot with white-filled circles indicate a cumulative positive temporal error that corresponds to overall delay in the trained administrator (S1) who disconnected the tube from the face mask of participant S3. The plot with black-filled circles indicate the cumulative absolute error (secs) over time. There was a significant absolute error in switching times (p<0.001).
