标题:Safety and efficacy of Natugrain® TS (endo-1,4-ß-xylanase and endo-1,4-ß-glucanase) as a feed additive for piglets (weaned), chickens for fattening, laying hens, turkeys for fattening and ducks - Scientific Opinion of the Panel on Additives and Products or Substances used in Animal Feed and the Panel on Genetically Modified Organisms