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Tissue microarray (TMA) samples demonstrating the expressions of (A) homeobox A10 (HOXA10), (B) estrogen receptor(ER)-α, (C) progesterone receptor (PR), and (D) PR-B proteins in rectosigmoid endometriosis. Samples in the right column magnified 200 times. gl indicates gland; st, stroma; sm, smooth muscle.
