Urban greenness and mortality in Canada's largest cities: a national cohort study oleh Dr Dan L Crouse, PhD, Lauren Pinault, PhD, Adele Balram, MPH, Perry Hystad, PhD, Paul A Peters, PhD, Hong Chen, PhD, Aaron van Donkelaar, PhD, Randall V Martin, PhD, Richard Ménard, PhD, Alain Robichaud, MSc, Paul J Villeneuve, PhD