Chen, Xiehui, Zhanke Wang, Jiaxuan Wang, Zhongzhen Zhu, Chunxin Li, and Tian Hu. “Alert for Pharynx-Centered Gastrointestinal and Respiratory Cross-Infection and Cryptic Cross-Transmission Routes of 2019-NCoV”. The Journal of Infection in Developing Countries 18, no. 04 (April 30, 2024): 501–503. Accessed June 30, 2024. https://jidc.org/index.php/journal/article/view/38728635.