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Matrigel tube formation of secreted factors derived from AMM/CI. (A) Representative pictures of Matrigel tube formation induced by CM of AMM, AMM/I, or AMM/CI for 3 h. Bars: 200 μm. (B) Quantification of Matrigel tube formation. Numbers of tube lengths and branching points were significantly higher in CM of AMM/CI compared with AMM or AMM/I. ** p < 0.01, n = 5 per group.
