Association between anticholinergic medication uses and the risk of pneumonia in elderly adults: a meta-analysis and systematic review oleh Mindan Wu, Zhixuan Li, Wenchuan Zheng, Jia Zhuang, Shuhan Wu, Qipeng Zhou, Junfu Cai, Houzhen Zheng, Guixing Zeng, Weilin Zhang, Shengbin Zhang, Maohuang Lin, Xianyang Zhong, Qichuan Zhang