R. . Uppala, N. . Prapphal, J. Deerojanawong, S. Sritippayawan, R. Samransamruajkit, and K. Pongsanon, “Pneumonia due to 2009 Influenza A (H1N1) Infection in Thai children: Chulalongkorn experience”, Chula Med J, vol. 56, no. 5, Sep. 2023.