[1] MIT,WHITEHEAD INST BIOMED RES,CAMBRIDGE,MA 02142
[2] MIT,DEPT BIOL,CAMBRIDGE,MA 02142
[3] WASHINGTON UNIV,SCH MED,DEPT MOL BIOL & PHARMACOL,ST LOUIS,MO 63110
[4] MIT,WHITEHEAD INST GENOME CTR,CAMBRIDGE,MA 02142
[5] UNIV CALIF SAN FRANCISCO,HOWARD HUGHES MED INST,SAN FRANCISCO,CA 94143
[6] UNIV CALIF SAN FRANCISCO,DEPT ANAT,CELL BIOL PROGRAM,SAN FRANCISCO,CA 94143
[7] UNIV CALIF SAN FRANCISCO,DEPT ANAT,PROGRAM DEV BIOL & NEUROSCI,SAN FRANCISCO,CA 94143
[8] NATL DEF MED COLL,DEPT PHYSIOL,TOKOROZAWA,SAITAMA 359,JAPAN
[9] MIT,CTR CANC RES,CAMBRIDGE,MA 02139
[10] JOHNS HOPKINS UNIV,JAMES BUCHANAN BRADY UROL INST,BALTIMORE,MD 21207
[11] TUFTS UNIV,SCH MED,DEPT PATHOL,BOSTON,MA 02111
[12] TUFTS UNIV,SCH VET MED,DEPT PATHOL,BOSTON,MA 02111