Xiao, Zuopeng, Xi Xie, Wenbo Guo, Zhiqiang Luo, Jianxiang Liao, Feiqiu Wen, Qingfeng Zhou, Laiwei Han, and Te Zheng. “Examining the Incubation Period Distributions of COVID-19 on Chinese Patients With Different Travel Histories”. The Journal of Infection in Developing Countries 14, no. 04 (April 30, 2020): 323-327. Accessed May 29, 2020. https://jidc.org/index.php/journal/article/view/32379707.