crRNAs targeting CAGTTGTGACTAGAGACTAG(tgg) in intron 5 and ATGCTTATGGAATTGATACG(tgg) in the region downstream of exon 14 and ssODN gggTGTCAAAGTATAGAAGCAAAATGCTTATGGAATTGATTTTATTTATTTAGGCAGGCCATAGTCCCACTTCACAGGTATGTGCACT were used with CRISPR/Cas9 technology to delete exons 6-14.