Multi−cellular rosettes in the mouse visceral endoderm facilitate the ordered migration of AVE cells

G. Trichas‚ A. Smith‚ N. White‚ V. Wilkins‚ A. Moore‚ B. Joyce‚ J. Sugnaseelan‚ T. Rodriguez‚ D. Kay‚ R. Baker‚ P. Maini and S. Srinivas