@book{38691,
	author = {Susser, Mervyn. and Stein, Zena.},
	title = {Eras in epidemiology},
	publisher = {Oxford University Press,},
	year = {c2009.},
	address = {New York ;},
	url = {http://dx.doi.org/10.1093/acprof:oso/9780195300666.001.0001}
}