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Schematic of the general study design and procedures. Hours awake is on the top x-axis and clock time is on the bottom x-axis. Allocated time in bed is indicated by black shading on Baseline and Recovery nights. Gray shading indicates the social exposure period from 10:00 to 22:00 on Day 1. PVT, modified MWT and SSS testing occurred hourly throughout (PVT and SSS alternated every 2 hrs with MWT administration).
