[1] UNIV HAWAII, CANC RES CTR, BASIC SCI PROGRAM, HONOLULU, HI 96813 USA
[2] WASHINGTON UNIV, SCH MED, DEPT PEDIAT, ST LOUIS, MO 63132 USA
[3] WASHINGTON UNIV, SCH MED, DEPT MED, ST LOUIS, MO 63132 USA
[4] HARVARD UNIV, SCH MED, DEPT ANAT, BOSTON, MA 02115 USA
[5] HARVARD UNIV, SCH MED, DEPT CELLULAR BIOL, BOSTON, MA 02115 USA