@article {swihart2009lasagna,
	title = {Lasagna plots: A Saucy alternative to spaghetti plots},
	journal = {Epidemiology},
	volume = {21},
	number = {5},
	year = {2010},
	pages = {621{\textendash}625},
	author = {Swihart, B and Caffo, B and James, B and Strand, M. and Schwartz, B and Punjabi, N}
}
