Bai, Y., Yao, L., Wei, T., Tian, F., Jin, D. Y., Chen, L., & Wang, M. (2020). Presumed asymptomatic carrier transmission of COVID-19. Jama, 323(14), 1406-1407. https://jamanetwork.com/journals/jama/article-abstract/2762028 doi:10.1001/jama.2020.2565