Cheng CY, Hsieh HL, Hsiao LD, Yang CM. PI3-K/Akt/JNK/NF-κB is essential for MMP-9 expression and outgrowth in human limbal epithelial cells on intact amniotic membrane. Stem Cell Res. 2012 Jul;9(1):9–23. doi: 10.1016/j.scr.2012.02.005. PMID: 22459175.