tokens: Treatments for the stress panel were : no treatment ( control ) ; DMSO as a control for celecoxib ; 20 mM celecoxib , brand name Celebrex (TM) ( dissolved in DMSO ) [ 31 ] ; 0 . 2 mM H2O2 [ 32 ] ; or 1 mg / mL G418 ( Pfizer , New York , NY , USA ) .