@book{37390,
	title = {The case-control method},
	publisher = {Oxford University Press,},
	year = {c2009.},
	series = {Monographs in epidemiology and biostatistics},
	address = {New York ;},
	url = {http://dx.doi.org/10.1093/acprof:oso/9780195187113.001.0001}
}