tokens: We have screened the elastin gene for mutations responsible for supravalvular aortic stenosis ( SVAS ) in two large , independently collected families with isolated ( nonsyndromic ) SVAS .
folded_tokens: we have screen the elastin gene for mutation responsible for supravalvular aortic stenosis ( SVAS ) in two large , independently collect family with isolate ( nonsyndromic ) sva .