title: Inaccuracy in neonatal measurement of urine concentration with a refractometer.
mesh_terms: D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D009994:Osmolar Concentration; D011897:Random Allocation; D012031:Refractometry / Q000295:instrumentation / Q000592:standards*; D012044:Regression Analysis; D013046:Specific Gravity; D013048:Specimen Handling; D014508:Urea / Q000652:urine; D014556:Urine / Q000032:analysis*
chemical_list: D014508:Urea