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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
A list of the number of peer-reviewed papers found in the PubMed using different keywords. Black bars: xylanase, growth, broiler chickens as key words; grey bars: xylanase, intestinal health, broiler chickens as keywords.