@book{8258,
	author = {Weiss, Noel S.,},
	title = {Clinical epidemiology :},
	publisher = {Oxford University Press,},
	year = {2006.},
	series = {Monographs in epidemiology and biostatistics ;},
	address = {Oxford ;},
	edition = {3rd ed.},
	url = {http://www.loc.gov/catdir/toc/ecip063/2005031889.html}
}