Initial PCR Testing Negative, but Chest CT Suggesting for Viral Pneumonia Urges for Repeated Testing for COVID-19 Diagnosis - Wang, Lingwei; Zhan, Danting; Liu, Xiaodi; Yang, Kai; Wu, Shipin; Zhang, Heng; Yu, Min; Zha, Yimin; Huang, Weibin; Li, Lei; Chen, Rongchang; Qiu, Chen (Frontiers in Molecular Biosciences, 2021)