Mullan CS, Riley M, Clarke D, Tatler A, Sutcliffe A, Knox AJ, Pang L. Beta-tryptase regulates IL-8 expression in airway smooth muscle cells by a PAR-2-independent mechanism. Am J Respir Cell Mol Biol. 2008 May;38(5):600–8. PMID: 18079491; PMCID: PMC2643247.