title: Methodology for a multicenter study of serious infections in young infants in developing countries. The WHO Young Infants Study Group.
mesh_terms: D001424:Bacterial Infections / Q000175:diagnosis / Q000453:epidemiology; D019411:Clinical Laboratory Techniques; D003625:Data Collection; D003906:Developing Countries / Q000706:statistics & numerical data; D005260:Female; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D015337:Multicenter Studies as Topic / Q000379:methods*; D012107:Research Design; D018401:Sample Size; D018805:Sepsis / Q000175:diagnosis / Q000453:epidemiology / Q000382:microbiology; D013048:Specimen Handling; D014777:Virus Diseases / Q000175:diagnosis / Q000453:epidemiology; D014944:World Health Organization