Effect of social support on illness perception in patients with atrial fibrillation during “Blanking Period”: Mediating role of sense of mastery oleh Yun‐Mei Ding, Cui‐Ping Liu, Hong‐Xuan Xu, Mao‐Jing Wang, Jing‐Ya Zhang, Jia‐Yun Gu, Yan Cui, Lili Wei, Yan Zhang