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Time until fall in the rotarod test before and after treatment in young (a) and old (b). (c) The time until fall in young and old rats after four weeks of vehicle and MEL administration. The stars (∗) mark the significance of the differences within animals of the same age and the cross (†) marks the difference between ages. ∗∗∗ P < 0.001; ∗ and † P < 0.05.
