1. Departments of Clinical Epidemiology & Biostatistics and Medicine; McMaster University; Hamilton; ON; Canada
2. Pediatric Division; Department of Child and Maternal Medicine; University of Milan Medical School at the Melloni Hospital; Milan; Italy
3. Bachelor of Health Sciences Programme; Faculty of Health Sciences; McMaster University; Hamilton; ON; Canada
4. Allergy & Respiratory Diseases Clinic; Department of Internal Medicine; University of Genoa; Genoa; Italy
5. Department of Clinical Epidemiology & Biostatistics; McMaster University; Hamilton; ON; Canada