Journal Article 22/07/2015 Utilization of cardiac computed tomography angiography and outpatient invasive coronary angiography in Ontario, CanadaRoifman I, Rezai MR, Wijeysundera HC, Chow BJ, Wright GA, Tu JV. J Cardiovasc Comput Tomogr. 2015; 9(6):567-71. Epub 2015 Jul 22.