colonization in broiler chickens was evaluated using systematic review-meta-analysis-meta-
regression (SR-MA-MR). Relevance screening identified 201 relevant studies that were
subjected to methodological assessment. Of these studies, 159 were suitable for data
extraction, 66 were presented in a number of MAs and 130 were examined in a meta-
regression (MR). Fourteen different CE products were identified, 9 of them commercial …