@book{7691,
	author = {WHO},
	title = {Persisting pain in children package:WHO guidelines on the pharmacological treatment of persisting pain in children with medical illnesses},
	publisher = {World Health Organization},
	year = {2012},
	address = {Geneva, Switzerland },
	edition = {Nil},
	url = {http://www.columbia.edu/cgi-bin/cul/resolve?clio10531980}
}