Mr. Marchie and Dr. Cusimano are with the Division of Neurosurgery and the Injury Prevention Research Centre, St. Michael's Hospital, University of Toronto, Toronto, Ont. Dr. Cusimano is an Associate Professor of Surgery in the Division of Neurosurgery and Mr. Marchie is a fourth-year medical student at the University of Toronto.
This article has been peer reviewed.
Competing interests: None declared.
Contributors: Both authors contributed substantially to the writing of the manuscript and approved the final version.
Acknowledgements: Dr. Cusimano is supported by research grants from the Ontario Neurotrauma Foundation. The opinions expressed in this article are those of the authors and do not necessarily reflect those of the foundation.
Correspondence to: Dr. Michael D. Cusimano, Division of Neurosurgery, St. Michael's Hospital, University of Toronto, 38 Shuter St., Toronto ON M5B 1AG; [email protected] or [email protected]