Lavigne, Eric; Donelle, Jessy; Hatzopoulou, Marianne; Van Ryswyk, Keith; van Donkelaar, Aaron; Martin, Randall V; Chen, Hong; Stieb, David M; Gasparrini, Antonio; Crighton, Eric; +4 more... Yasseen III, Abdool S; Burnett, Richard T; Walker, Mark; Weichenthal, Scott; (2019) Spatiotemporal Variations in Ambient Ultrafine Particles and the Incidence of Childhood Asthma. American Journal of Respiratory And Critical Care Medicine. ISSN 1073-449X DOI: https://doi.org/10.1164/rccm.201810-1976OC Item availability may be restricted.