Comparison of acute pneumonia caused by SARS-COV-2 and other respiratory viruses in children: a retrospective multi-center cohort study during COVID-19 outbreak oleh Guang-Li Ren, Xian-Feng Wang, Jun Xu, Jun Li, Qiong Meng, Guo-Qiang Xie, Bo Huang, Wei-Chun Zhu, Jing Lin, Cheng-He Tang, Sheng Ye, Zhuo Li, Jie Zhu, Zhen Tang, Ming-Xin Ma, Cong Xie, Ying-Wen Wu, Chen-Xi Liu, Fang Yang, Yu-Zong Zhou, Ying Zheng, Shu-Ling Lan, Jian-Feng Chen, Feng Ye, Yu He, Ben-Qing Wu, Long Chen, Si-Mao Fu, Cheng-Zhong Zheng, Yuan Shi