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Gu, Zhenyu, Masatoshi Nomura, Brenda B. Simpson, Hong Lei, Alie Feijen, Janny van den Eijnden-van Raaij, Patricia K. Donahoe, and En Li. The Type I Activin Receptor ActRIB Is Required for Egg Cylinder Organization and Gastrulation in The mouse. Cold Spring Harbor Laboratory Press, 1998.

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