Files in this Data Supplement:

• Supplemental file 1 - Percentage composition and calculated analysis of broiler diets used in trials 1 and 2 (Table S1) and in trial 3 (Table S2); bacterial strains and real-time PCR thresholds (Table S3); effects of dietary composition (Table S4) and stocking density (Table S5) on performance of broilers 1–35 days of age; effect of antimicrobial drugs on performance of broilers 1–26 days of age (Table S6).
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