GBE1 and glycogen storage disease due to glycogen branching enzyme deficiency: GSDs types 0a (gene GYS2, OMIM # 240600), IV or Andersen disease (GBE1, OMIM # 232500), VI or Hers disease (PYGL, OMIM # 232700), IXa (PHKA2, OMIM # 306000), IXb (PHKB, OMIM # 261750), IXc (PHKG2, OMIM # 613027) and XI or Fanconi-Bickel syndrome (SLC2A2, OMIM # 227810) are included into the group of hepatic GSDs together with types I and III.