Hi, my spouse has been taking Tarceva for a few years. To my knowledge, generic Tarceva has been available on market since last year. I was wondering if any of you know the efficacy of the generic Tarceva. Those generics include Mylan, Teva and Armas. Do they have the same efficacy as the branded Tarceva? Do these generic brands show differences in efficacy from one to another? Any information is appreiated? Thank you.