Response by Girotra and Chan to Letter Regarding Article, “Regional Variation in Out-of-Hospital Cardiac Arrest Survival in the United States”
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We appreciate the interest of Bougouin et al in our study and agree that, although bystander cardiopulmonary resuscitation is an important link in the chain of survival, other factors such as timeliness of the emergency response, quality of resuscitation, therapeutic interventions, and organized post-resuscitation care are important and likely account for the unexplained variation in cardiac arrest survival in our study.1,2 …