[1] STANFORD UNIV,MED CTR,DEPT NEUROL,DIV PEDIAT NEUROL,STANFORD,CA 94305
[2] STANFORD UNIV,MED CTR,DEPT RADIOL,STANFORD,CA 94305
[3] UNIV CALIF SAN DIEGO,SAN DIEGO MED CTR,DEPT PEDIAT,SAN DIEGO,CA 92103
[4] UNIV CALIF SAN DIEGO,SAN DIEGO MED CTR,DEPT RADIOL,SAN DIEGO,CA 92103