[1] NATL INST MED RES,LONDON NW7 1AA,ENGLAND
[2] UNIV CINCINNATI,COLL MED,CINCINNATI,OH 45267
[3] TEXAS A&M UNIV,INST BIOSCI & TECHNOL,HOUSTON,TX 77030
[4] MEM SLOAN KETTERING CANC CTR,PROGRAM MOLEC BIOL,NEW YORK,NY 10021
[5] UNIV CALIF BERKELEY,BERKELEY,CA 94720
[6] NEW YORK STATE DEPT HLTH,WADSWORTH CTR LABS & RES,ALBANY,NY 12201