Influenza-associated cardiovascular mortality in older adults in Beijing, China: a population-based time-series study oleh Xin Du, Peng Yang, Chandini Raina MacIntyre, Rong Liu, Quanyi Wang, Guotong Xie, Shuangsheng Wu, Jianzeng Dong, Xiaoshuang Liu, Liu He, Tiange Chen, Jianting Su, Shijun Xia, Chao Jiang, Mark D. Huffman, Zaihua Wei, Craig Anderson