Identifying Individuals with Physcian Diagnosed COPD in Health Administrative DatabasesAndrea S. Gershon, Teresa To, Lisa Cicutto et al.|COPD Journal of Chronic Obstructive Pulmonary Disease|2009Cited by 664
Trends in Asthma Prevalence and Incidence in Ontario, Canada, 1996-2005: A Population StudyAndrea S. Gershon, Teresa To, Jun Guan et al.|American Journal of Epidemiology|2010Cited by 178