Lee, J. W., S. W. Ryu, H. Song, Y. J. Yang, and D. H. Moon. “Evaluation of Myocardial Flow Reserve Using Pharmacological Stress Thallium-201 Single-Photon Emission Computed Tomography: Is There a Difference Between Total Arterial Off-Pump Coronary Artery Bypass Grafting and Conventional Coronary Artery Bypass”. The Heart Surgery Forum, vol. 7, no. 5, Jan. 2005, pp. E471-E476, doi:10.1532/HSF98.20041071.