Shangguan, Yanwan, Hong Fang, Shuting Wang, Zhongkang Ji, Pei Shi, Xuewen Feng, and Kaijin Xu. “Risk Factors for Negative T-SPOT.TB Assay Results in Patients With Confirmed Active Tuberculosis: A Retrospective Study”. The Journal of Infection in Developing Countries 14, no. 11 (November 30, 2020): 1288–1295. Accessed November 27, 2024. https://jidc.org/index.php/journal/article/view/33296342.