@article {Lang:2007:0020-1324:490,
	author = "Lang, Thomas A.",
	title = "Study Design and Statistical Analysis: A Practical Guide for Clinicians",
	journal = "Respiratory Care",
	volume = "52",
	number = "4",
	year = "2007",
	abstract = "",
	pages = "490-491",
	url = "http://www.ingentaconnect.com/content/jrcc/rc/2007/00000052/00000004/art00010"
}