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. Author manuscript; available in PMC: 2010 Jul 15.
Published in final edited form as: Sleep Med Clin. 2009 Jun 1;4(2):257–271. doi: 10.1016/j.jsmc.2009.03.001

Figure 2.

Figure 2

Subjective sleepiness (KSS) in rapidly rotating shift workers (mean±se). Filled points (grey) indicate sleepiness during work hours.