1.Higuchi, S., Watanabe, T. M., Kawauchi, K., Ichimura, T. & Fujita, H. Culturing of mouse and human cells on soft substrates promote the expression of stem cell markers. Journal of Bioscience and Bioengineering 6, 749–755 (2014). doi: 10.1016/j.jbiosc.2013.11.011