Gonadotropin‐releasing hormone agonist treatment and ischemic heart disease among female patients with breast cancer: A cohort study oleh Yi‐Sheng Chou, Chun‐Chieh Wang, Li‐Fei Hsu, Pei‐Hung Chuang, Chi‐Feng Cheng, Nai‐Hsin Li, Chu‐Chieh Chen, Chien‐Liang Chen, Yun‐Ju Lai, Yung‐Feng Yen