MYO7A and Usher syndrome type 1B: Since it is a large gene, and therefore difficult to package into the AAV vector, UshStat, an EIAV lentiviral vector carrying the wild-type MYO7A gene (EIAV-CMV-MYO7A), was developed and injected in the shaker1 mouse model for Usher syndrome type 1B [56].