Major health problems in the practice of medicine in developing countries.
D003906:Developing Countries; D005102:Health Expenditures; D006285:Health Planning; D006280:Health Workforce / Q000600:supply & distribution; D009748:Nutrition Disorders / Q000453:epidemiology; D011156:Population Density; D011364:Professional Practice; D011787:Quality of Health Care; D012499:Sanitation; D012959:Socioeconomic Factors; D014611:Vaccination