@book{4507,
	author = {Uchtenhagen,_A ... [et al.].},
	title = {Prescription of narcotics for heroin addicts : main results of the Swiss National  Cohort Study.},
	publisher = {Karger,},
	year = {1999.},
	series = {(Medical prescription of narcotics ; vol. 1).},
	address = {Basel : }
}