The global burden of preterm birth.
D017281:Cost of Illness; D014943:Global Health; D006287:Health Planning Guidelines; D006301:Health Services Needs and Demand; D006801:Humans; D007226:Infant Mortality; D007231:Infant, Newborn; D009017:Morbidity; D011159:Population Surveillance; D047928:Premature Birth / Q000453:epidemiology* / Q000517:prevention & control; D015995:Prevalence