In the Introduction:"In another study, distance to a metro station predicted the clustering of dengue cases over two epidemic years in Singapore 11 , suggesting that dengue can be tied to hubs of human transport within the space of a city." now reads: "In another study, distance to a metro station predicted the clustering of dengue cases over two epidemic years in Kaohsiung, Taiwan 11 , suggesting that dengue can be tied to hubs of human transport within the space of a city."