A Cascaded Learning Strategy for Robust COVID-19 Pneumonia Chest X-Ray Screening. - Chun-Fu Yeh; Hsien-Tzu Cheng; Andy Wei; Keng-Chi Liu; Mong-Chi Ko; Po-Chen Kuo; Ray-Jade Chen; Po-Chang Lee; Jen-Hsiang Chuang; Chi-Mai Chen; Nai-Kuan Chou; Yeun-Chung Chang; et al. (CoRR, 2020)