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Indicated the chorioallantoic membrane of a 12-day old chick embryo incubated for 4 days with a cover slip treated with or without treatment. (a) Showing normal; (b) showing VEGF (50 ng); (c) showing VEGF (50 ng) + thalidomide (10 μg); (d-f) Indicating VEGF (50 ng) + CP at the concentrations of 25, 50, and 100 μg, respectively
