From The Hospital for Sick Children (A.H., A.M., and L.R.) and Ryerson University (D.M., S.B., M.C., and I.H.), Toronto, Canada.
Submitted for publication July 16, 2003.
Accepted for publication December 17, 2004.
Work described here was supported in part by the Ontario Neurotrauma Foundation grant number ONCO-00042.
Address for reprints: Dr. Andrew W. Howard, The Hospital for Sick Children, 555 University Avenue, Rm. S-107, Toronto, ON M5G 1X8; email: firstname.lastname@example.org.