TY - STD TI - Science, [http://www.sciencemag.org] UR - http://www.sciencemag.org ID - ref1 ER - TY - STD TI - Dana-Farber Cancer Institute , [http://www.dfci.harvard.edu] UR - http://www.dfci.harvard.edu ID - ref2 ER - TY - STD TI - Unusual proliferation arrest and transcriptional control properties of a newly discovered E2F family member, E2F-6. ID - ref3 ER -