[1] SALK INST BIOL STUDIES,HOWARD HUGHES MED INST,LA JOLLA,CA 92037
[2] UNIV TEXAS,SW MED CTR,HOWARD HUGHES MED INST,DALLAS,TX 75235
[3] UNIV UTAH,HOWARD HUGHES MED INST,SALT LAKE CITY,UT 84112
[4] INST MOLEK BIOL & TUMORFORSCH,D-35037 MARBURG,GERMANY
[5] FORSCHUNGSZENTRUM KARLSRUHE,D-76021 KARLSRUHE,GERMANY
[6] DEUTSCH KREBSFORSCHUNGSZENTRUM,D-69120 HEIDELBERG,GERMANY
[7] ADV INST SCI & TECHNOL,GRAD SCH BIOL SCI,NARA 63001,JAPAN
[8] SALK INST BIOL STUDIES,LA JOLLA,CA 92037
[9] CTR NATL RECH SCI,INST GENET & BIOL MOLEC CELLULAIRE,INST NATL SANTE & RECH MED,F-67404 ILLKIRCH GRAFFENS,FRANCE