@book{7980,
	author = {Haynes, R. Brian.},
	title = {Clinical epidemiology :},
	publisher = {Lippincott Williams & Wilkins,},
	year = {c2006.},
	address = {Philadelphia :},
	edition = {3rd ed.},
	url = {http://www.loc.gov/catdir/toc/ecip0510/2005008293.html}
}