No. CV–11–00270–PHX–DGC. 2012-05-3 Nicolai TAVILLA, et al., Plaintiffs, v. CEPHALON, INC., a Delaware Corporation, Defendant. A.R.S. § 12–542 Richard T. Treon, Treon Aguirre Newman & Norris PA, Phoenix, AZ, for Plaintiffs. DAVID G. CAMPBELL Recognized as Unconstitutional A.R.S. § 12–542Richard T. Treon, Treon Aguirre Newman & Norris PA, Phoenix, AZ, for Plaintiffs. John F. Brenner, Pepper Hamilton LLP, Princeton, NJ, Kathleen Kelly Kahn, Stephen M. Bressler, Lewis & Roca LLP, Phoenix, AZ, for Defendant