W
        =
        
          
            1
            2
          
        
        
          a
          
            i
            j
            k
            l
          
        
        
          E
          
            i
            j
          
        
        
          E
          
            k
            l
          
        
      
    
    {\displaystyle W={\frac {1}{2}}a_{ijkl}E_{ij}E_{kl}}
  On the other hand, the linear term is negligible when the analysis rely only on big strains.
See also
Inborn error of metabolism
Leukocyte adhesion deficiency
PMM2 deficiency

References
External links

GeneReviews/NIH/NCBI/UW entry on PMM2-CDG (CDG-Ia)Carbohydrate-Deficient Glycoprotein Syndrome, Type 1a; Congenital Disorder of Glycosylation Type 1a; Jaeken Syndrome
OMIM entries on Carbohydrate-Deficient Glycoprotein Syndrome, Type 1a; Congenital Disorder of Glycosylation Type 1a; Jaeken Syndrome
GeneReviews/NIH/NCBI/UW entry on Congenital Disorders of Glycosylation Overview