Developing countries World Health Organization 4 Delivery of health care 3 Primary health care 3 Congenital abnormalities - epidemiology 2 Congenital abnormalities - prevention and control 2 Neural tube defects 2 Noncommunicable diseases 2 Practice guideline 2 Public health surveillance 2 health services - organization and administration 2 Asthma prevention and control 1 Centers for Disease Control and Prevention (U.S.) 1 Centers for Disease Control and prevention 1 Chronic disease prevention and control 1 Diabetes mellitus type 2 prevention and control 1 Guidelines 1 International Clearinghouse for Birth Defects Monitoring System 1 International Clearinghouse for Birth Defects Monitoring Systems 1 Pulmonary disease, chronic obstructive prevention and control 1