Bmp7 Functions via a Polarity Mechanism to Promote Cloacal Septation Xu, Kun ; Wu, Xinyu ; Shapiro, Ellen ; Huang, Honging ; Zhang, Lixia ; Hickling, Duane ; Deng, Yan ; Lee, Peng ; Li, Juan ; Lepor, Herbert ; Grishina, Irina Abstract Publication: PLoS ONE Pub Date: January 2012 DOI: 10.1371/journal.pone.0029372 Bibcode: 2012PLoSO...729372X