T. K. Tran, S. Nguyen Truong, L. Tran Thanh, N. Le Hoang Gia, H. Pham Trung, and B. Tran Dinh, “Post-COVID condition: a survey of patients recovered from COVID-19 in Central Vietnam”, J Infect Dev Ctries, vol. 17, no. 09, pp. 1213–1220, Sep. 2023.