World Health Organization Series 16 Guidelines 9 Risk assessment 8 Developing countries 6 Food and Agriculture Organization of the United Nations 5 Cost of illness 4 Delivery of health care 4 Health policy 4 Manuals 4 Research 4 Biological products standards 3 Child 3 Communicable disease control 3 Environmental health 3 Practice guideline 3 Reference standards 3 Vaccines standards 3 World Health Organization history 3 World health 3 Alcohol drinking adverse effects 2 Centers for Disease Control and Prevention (U.S.) 2 Chronic Disease - prevention and control 2 Chronic disease prevention and control 2 Congenital abnormalities - epidemiology 2 Congenital abnormalities - prevention and control 2 Demography 2 Developing Countries 2 Diet adverse effects 2 Disease vectors 2