Comparison of childhood asthma incidence in 3 neighbouring cities in southwestern Ontario: a 25-year longitudinal cohort study

Children’s Hospital of Eastern Ontario Research Institute (Radhakrishnan); Department of Pediatrics (Radhakrishnan), University of Ottawa; ICES uOttawa (Radhakrishnan), Ottawa, Ont.; ICES Western (Bota, Ouédraogo, Clemens, Shariff); London Health Sciences Centre (Price, Husein); Departments of Pediatrics (Price), of Surgery (Husein), of Medicine (Clemens), and of Epidemiology and Biostatistics (Clemens), Western University; Lawson Health Research Institute (Price, Husein, Shariff), London, Ont.

Children’s Hospital of Eastern Ontario Research Institute (Radhakrishnan); Department of Pediatrics (Radhakrishnan), University of Ottawa; ICES uOttawa (Radhakrishnan), Ottawa, Ont.; ICES Western (Bota, Ouédraogo, Clemens, Shariff); London Health Sciences Centre (Price, Husein); Departments of Pediatrics (Price), of Surgery (Husein), of Medicine (Clemens), and of Epidemiology and Biostatistics (Clemens), Western University; Lawson Health Research Institute (Price, Husein, Shariff), London, Ont.

Children’s Hospital of Eastern Ontario Research Institute (Radhakrishnan); Department of Pediatrics (Radhakrishnan), University of Ottawa; ICES uOttawa (Radhakrishnan), Ottawa, Ont.; ICES Western (Bota, Ouédraogo, Clemens, Shariff); London Health Sciences Centre (Price, Husein); Departments of Pediatrics (Price), of Surgery (Husein), of Medicine (Clemens), and of Epidemiology and Biostatistics (Clemens), Western University; Lawson Health Research Institute (Price, Husein, Shariff), London, Ont.

Children’s Hospital of Eastern Ontario Research Institute (Radhakrishnan); Department of Pediatrics (Radhakrishnan), University of Ottawa; ICES uOttawa (Radhakrishnan), Ottawa, Ont.; ICES Western (Bota, Ouédraogo, Clemens, Shariff); London Health Sciences Centre (Price, Husein); Departments of Pediatrics (Price), of Surgery (Husein), of Medicine (Clemens), and of Epidemiology and Biostatistics (Clemens), Western University; Lawson Health Research Institute (Price, Husein, Shariff), London, Ont.

Children’s Hospital of Eastern Ontario Research Institute (Radhakrishnan); Department of Pediatrics (Radhakrishnan), University of Ottawa; ICES uOttawa (Radhakrishnan), Ottawa, Ont.; ICES Western (Bota, Ouédraogo, Clemens, Shariff); London Health Sciences Centre (Price, Husein); Departments of Pediatrics (Price), of Surgery (Husein), of Medicine (Clemens), and of Epidemiology and Biostatistics (Clemens), Western University; Lawson Health Research Institute (Price, Husein, Shariff), London, Ont.

Children’s Hospital of Eastern Ontario Research Institute (Radhakrishnan); Department of Pediatrics (Radhakrishnan), University of Ottawa; ICES uOttawa (Radhakrishnan), Ottawa, Ont.; ICES Western (Bota, Ouédraogo, Clemens, Shariff); London Health Sciences Centre (Price, Husein); Departments of Pediatrics (Price), of Surgery (Husein), of Medicine (Clemens), and of Epidemiology and Biostatistics (Clemens), Western University; Lawson Health Research Institute (Price, Husein, Shariff), London, Ont.

Children’s Hospital of Eastern Ontario Research Institute (Radhakrishnan); Department of Pediatrics (Radhakrishnan), University of Ottawa; ICES uOttawa (Radhakrishnan), Ottawa, Ont.; ICES Western (Bota, Ouédraogo, Clemens, Shariff); London Health Sciences Centre (Price, Husein); Departments of Pediatrics (Price), of Surgery (Husein), of Medicine (Clemens), and of Epidemiology and Biostatistics (Clemens), Western University; Lawson Health Research Institute (Price, Husein, Shariff), London, Ont.