Estimation of the asymptomatic ratio of novel coronavirus infections (COVID-19) - Nishiura, Hiroshi; Kobayashi, Tetsuro; Miyama, Takeshi; Suzuki, Ayako; Jung, Sung-mok; Hayashi, Katsuma; Kinoshita, Ryo; Yang, Yichi; Yuan, Baoyin; Akhmetzhanov, Andrei R.; Linton, Natalie M. (International journal of infectious diseases, 2020)