In the November 2012 Molecular Endocrinology article by Williams et al., “The microRNA (miR)-199a/214 Cluster Mediates Opposing Effects of Progesterone and Estrogen on Uterine Contractility during Pregnancy and Labor” (Mol Endocrinol 26:1857–1867; doi: 10:1210/me.2012–1199), Panel B of Fig. 4 was not printed correctly. The correct figure is reproduced below. The printer regrets the error.
Fig. 4.

