SLC39A13 and myopia: An additional eGene, the zinc transporter encoding gene SLC39A13, is mutated in spondylodysplastic Ehlers–Danlos syndrome (OMIM 612350), a rare syndrome with multi-tissues manifestations: skeletal dysplasia, blue sclera, muscular hypotonia, and ocular impairments that include myopia and keratoconus.