Early warning systems (EWSs) for chikungunya, dengue, malaria, yellow fever, and Zika outbreaks: What is the evidence? A scoping review. - Hussain-Alkhateeb, Laith; Rivera Ramírez, Tatiana; Kroeger, Axel; Gozzer, Ernesto; Runge-Ranzinger, Silvia (PLoS Neglected Tropical Diseases, 2021)