Li, Yang, Chuanwu Zhu, Biao Zhang, Longgen Liu, Fang Ji, Yun Zhao, Juan Cheng, et al. “Nutritional Status Is Closely Related to the Severity of COVID-19: A Multi-Center Retrospective Study”. The Journal of Infection in Developing Countries 15, no. 04 (April 30, 2021): 490–500. Accessed November 28, 2024. https://jidc.org/index.php/journal/article/view/33956648.