World Health Organization Series 6 Guidelines 5 Risk assessment 5 Cost of illness 3 Environmental health 3 Health policy 3 Manuals 3 Alcohol drinking adverse effects 2 Biological products standards 2 Chronic disease prevention and control 2 Communicable disease control 2 Delivery of health care 2 Demography 2 Developing countries 2 Diet adverse effects 2 Food additives analysis 2 Food additives toxicity 2 Food and Agriculture Organization of the United Nations 2 Food contamination 2 Handbooks 2 Health services accessibility 2 Health status indicators 2 Life expectancy 2 Morbidity 2 Mortality 2 National health programs organization and administration 2 Public policy 2 Reference standards 2 Research 2