Jayarajah U, Dissanayake U, Abeysuriya V, de Silva PK, Jayawardena P, Kulatunga A, Fernando H, Madarasinghe M, Hapugoda D, Perera L, Kannangara V, Udayangani C, Peiris R, Faizer S, Yasawardene P, de Mel S, de Zoysa I, Seneviratne SL (2020) Comparing the 2009 and 1997 World Health Organization dengue case classifications in a large cohort of South Asian patients. J Infect Dev Ctries 14:781–787. doi: 10.3855/jidc.12468