Pichel J G, Shen L, Sheng H Z, Granholm A C, Drago J, Grinberg A, Lee E J, Huang S P, Saarma M, Hoffer B J, Sariola H, Westphal H
Laboratory of Mammalian Genes and Development, National Institutes of Health, Bethesda, Maryland 20892, USA.
Cold Spring Harb Symp Quant Biol. 1996;61:445-57.