Gruber BL, Marchese MJ, Santiago-Schwarz F, Martin CA, Zhang J, Kew RR. Protease-Activated Receptor-2 (PAR-2) Expression in Human Fibroblasts is Regulated by Growth Factors and Extracellular Matrix. Journal of Investigative Dermatology. 2004 Nov;123(5):832–9. doi: 10.1111/j.0022-202x.2004.23445.x.