0120-41570120-4157S0120-4157201700010002810.7705/biomedica.v37i1.3174Colombia00012017000120173712833World Health Organization2015Instituto Nacional de Salud2014Instituto Nacional de Salud2014World Health OrganizationWorld Health Organization2008201244283-92008463660-72008463426-8200991-9200281347-92012121-72011382185-922002403789-922011139467-7320122992-82013512220-42011492688-90200927474-80