Platelet‐to‐lymphocyte ratio is associated with prognosis in patients with coronavirus disease‐19 - Qu, Rong; Ling, Yun; Zhang, Yi‐hui‐zhi; Wei, Li‐ya; Chen, Xiao; Li, Xu‐mian; Liu, Xuan‐yong; Liu, Han‐mian; Guo, Zhi; Ren, Hua; Wang, Qiang (Journal of medical virology, 2020)