https://ikf.hamburg/publikationen/residual-galactosylsphingosine-psychosine-beta-galactosidase-activities-and-associated-galc-mutations-in-late-and-very-late-onset-krabbe-disease/
Residual galactosylsphingosine (psychosine) beta-galactosidase activities and associated GALC...
beta galactosidaseresidualgalactosylsphingosinepsychosineactivities