A study of serum sialic acid levels.
D002648:Child; D002675:Child, Preschool; D006801:Humans; D007223:Infant; D019158:N-Acetylneuraminic Acid; D012794:Sialic Acids / Q000097:blood*
D012794:Sialic Acids; D019158:N-Acetylneuraminic Acid