Utilization of laboratory services: electrolytes and urea.
D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D019411:Clinical Laboratory Techniques / Q000706:statistics & numerical data*; D004573:Electrolytes / Q000032:analysis*; D006296:Health Services; D006300:Health Services Misuse; D006801:Humans; D009549:Nigeria; D014508:Urea / Q000032:analysis*
D004573:Electrolytes; D014508:Urea