Affiliation: | (1) Laboratory of Mammalian Genes and Development, Building 6B, Room 413, National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland 20892-2790, USA, US;(2) Mammalian Genetics Laboratory, ABL-Basic Research Program, NCI-Frederick Cancer Research and Development Center, Frederick, Maryland 21702, USA, US |