@book{4856,
	author = {World Health Organization},
	title = {Guidelines for using HIV testing technologies in surveillance : },
	publisher = {WHO,},
	year = {2001.},
	address = {Geneva :},
	url = {https://apps.who.int/iris/bitstream/handle/10665/164358/9789241598057_eng.pdf?sequence=1&isAllowed=y}
}