[1] ST CHRISTOPHERS HOSP CHILDREN, DEPT PEDIAT, NEONATOL SECT, PHILADELPHIA, PA 19133 USA
[2] ALBERT EINSTEIN MED CTR, NO DIV, DIV NEONATOL, PHILADELPHIA, PA 19141 USA
[3] TEMPLE UNIV, SCH MED, DEPT PEDIAT, PHILADELPHIA, PA 19122 USA
[4] TEMPLE UNIV, SCH MED, DEPT NEUROL, PHILADELPHIA, PA 19122 USA
[5] ST CHRISTOPHERS HOSP CHILDREN, DEPT PEDIAT, NEUROL STN, PHILADELPHIA, PA 19133 USA