Prognostic nomogram on admission predicting progression for patients with nonsevere COVID-19 oleh Zhi Wang, Bin-Yan Zhong, Hui Dai, Qiu-Zhen Xu, Wei-Bin Yang, Xin Zhang, Chuan-Jun Xu, Jin-Er Shu, Biao Shi, Chu-Hui Zeng, Cheng Li, Jian-Song Ji, Yong-Gang Li, Gao-Jun Teng