@article {laffan2010utility,
	title = {Utility of sleep stage transitions in assessing sleep continuity},
	journal = {Sleep, PMCID: PMC2982738},
	volume = {33},
	number = {12},
	year = {2010},
	pages = {1681},
	issn = {0161-8105},
	author = {Laffan, A and Caffo, B and Swihart, B and Punjabi, N}
}
