Fig. 3.

The Breathing surrogate waveforms from a large set of data provided to us [see text for more information]. The interquartile distance between the 3^rd and 1^st quartiles is varied but made the same, A, for all 100 waveforms, 5/patient, 20 patients. Note the large variation in outliers, medians (red lines inside the boxes) both within and between patients. The thin ‘box’ for each distribution is formed by the 1^st and 3^rd quartiles of the breathing displacement distribution.