[1] ST CHRISTOPHERS HOSP CHILDREN, DEPT PEDIAT, PHILADELPHIA, PA 19133 USA
[2] ST CHRISTOPHERS HOSP CHILDREN, DEPT ANAT, PHILADELPHIA, PA 19133 USA
[3] TEMPLE UNIV, SCH MED, PHILADELPHIA, PA 19122 USA
[4] DEPT PUBL HLTH, DIV MED EXAMINER, PHILADELPHIA, PA 19107 USA
[5] ST CHRISTOPHERS HOSP CHILDREN, DEPT PATHOL, 2600 N LAWRENCE ST, PHILADELPHIA, PA 19133 USA