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This is to certify that your paper entitled «The effect of in ovo serotonin injection on heart HspP۷۰ and Hsp۹۰ gene expression in heat stressed broiler embryo» was indexed with 8 pages, in the CIVILICA citation database, code COI:TICNF09_037, after evaluation and approval of the referees of the "Ninth International Congress on Development of Agricultural and Environment with emphasis on the UN Development Program held in Tehran 2024.

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