Sean A Kennedy1, Mark O Baerlocher2. 1. School of Medicine (Kennedy), McMaster University, Hamilton, Ont.; Department of Radiology (Baerlocher), Royal Victoria Hospital, Barrie, Ont. sean.kennedy@medportal.ca. 2. School of Medicine (Kennedy), McMaster University, Hamilton, Ont.; Department of Radiology (Baerlocher), Royal Victoria Hospital, Barrie, Ont.