Emergency department computed tomography utilization in the United States and Canada
Annals of Emergency Medicine (2013) - Comments
pubmed: 23683773  doi: 10.1016/j.annemergmed.2013.02.018  issn: 1097-6760  issn: 0196-0644 

Carl T. Berdahl, Marian J. Vermeulen, David B. Larson, Michael J. Schull