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. 2015 Oct 1;6:208. doi: 10.3389/fneur.2015.00208

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Copyright © 2015 Facer-Childs and Brandstaetter.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Variability of within-team circadian phenotype composition determines predicted diurnal performance curves and peak performance times. Each team (T1–T12) is represented by a pie chart showing the composition of circadian phenotypes and a graph showing predicted performance over the course of a day calculated from performance tests conducted at six different times of day (25). Peak performance times are indicated by the dotted vertical lines and shown in the top left hand corner of each graph. Early circadian phenotypes (ECT) are shown in white, intermediate circadian phenotypes (ICT) in gray and late circadian phenotypes (LCT) in black. (A) T1. (B) T2. (C) T3. (D) T4. (E) T5. (F) T6. (G) T7. (H) T8. (I) T9. (J) T10. (K) T11. (L) T12.