Duerson family drops NFL concussion appealPHILADELPHIA — The family of the late Chicago Bears safety Dave Duerson has decided not to appeal the potential $1 billion settlement of NFL concussion lawsuits.Chicago lawyer Thomas A. Demetrio said the family doesn’t want to hold up awards for retirees who need them sooner rather than later.Demetrio has criticized aspects of the plan, especially the exclusion of future awards for the brain trauma found in Duerson and other former players after their deaths.However …