Title Effectiveness of different Newcastle disease vaccination programs in Iranian broiler farms: a case-control study Type Article Keywords Not Record Abstract Not Record Researchers Shohreh Alian Samakkhah (First researcher) , alireza bahonar (Second researcher) , seyed ali ghafori (Third researcher) , avesta sadrzadeh (Fourth researcher) , mohamad hossein falah mehrabadi (Fifth researcher) , farshad zaynolabedin tehrani (Not in first six researchers) , zahra talebi (Not in first six researchers)