[1] CATHOLIC UNIV LEUVEN,REGA INST MED RES,LAB MOL IMMUNOL,B-3000 LOUVAIN,BELGIUM
[2] CATHOLIC UNIV LEUVEN,REGA INST MED RES,MED CHEM LAB,B-3000 LOUVAIN,BELGIUM
[3] UNIV INSTELLING ANTWERP,FAC MED,DIV PHARMACOL,B-2610 WILRIJK,BELGIUM
[4] NCI,FREDERICK CANC RES & DEV CTR,MOL IMMUNOREGULAT LAB,FREDERICK,MD 21702