Donohue Brown Mathewson & Smyth LLC added Jessica Kaminski, Emily Miller, Derek Springer and Jack Stamos as associates.Kaminski is a civil litigation attorney with a concentration in the defense of professional negligence.Miller focuses her practice on commercial litigation, product liability, and legal and professional liability.Springer concentrates his practice in professional negligence, product liability and commercial litigation defense.Stamos focuses his practice in product liability, professional liability and …