DOI:
10.1055/s-00035148
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References
Kawada T, Suzuki H, Shimizu T. et al.
Polygraphic sleep latency and subjective sleepiness by visual analog scale (VAS): the limitation of VAS.
Appl Ergonomics 2012;
43 (01) 266 author reply 267. DOI: 10.1016/j.apergo.2011.03.009.
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