List of Articles A. Zakeri Article 1 - Comparative Study of Probiotic, Acidifier, Antibiotic Growth Promoters and Prebiotic on Activity of HumoralImmune and Performance Parameters of Broiler Chickens S. Mahdavi A. Zakeri Y. Mehmannavaz A. Nobakht Iranian Journal of Applied Animal Science , Issue 2 , Year , Spring 2013