B4GALT7 and spondylodysplastic Ehlers-Danlos syndrome: Later, the EDS nosology has used the name “spondylodysplastic EDS” for a group of three conditions, B3GALT6 deficiency (better known as spondyloepimetaphyseal dysplasia with joint laxity, Beighton type), B4GALT7 deficiency, and SLC39A13 deficiency (the original spondylo-cheiro-dysplastic type) [3].