Diagnostic and clinical benefit of combined coronary calcium and perfusion assessment in patients undergoing PET/CT myocardial perfusion stress imaging. - Bybee KA; Lee J; Markiewicz R; Longmore R; McGhie AI; O'Keefe JH; Hsu BL; Kennedy K; Thompson RC; Bateman TM (Journal of nuclear cardiology : official publication of the American Society of Nuclear Cardiology, 2010)