Phase-contrast photographs of PC12 neurites at day 3. (a) Treatment with 50 ng/ml NGF (b) Treatment with 25 μg/ml of aqueous extract, and (c) Negative control, treatment of nither of (a) and (b). Scale bar = 20 μm. Arrows indicate neurite extentions.
Phan et al. BMC Complementary and Alternative Medicine 2012 12:102 doi:10.1186/1472-6882-12-102