@book{502335,
	author = {Olsen, Jorn, and Christensen, Kaare, },
	title = {An introduction to epidemiology for health professionals /},
	publisher = {Springer,},
	year = {c2010},
	series = {Springer series on epidemiology and health,},
	address = {New York :},
	url = {https://link.springer.com/book/10.1007/978-1-4419-1497-2}
}