Chen, Ji, et al. “Imaging Primary Prostate Cancer With 11C-Choline PET CT: Relation to Tumour Stage, Gleason Score and Biomarkers of Biologic Aggressiveness”. Radiology and Oncology, vol. 46, no. 3, Sept. 2012, https://www.radioloncol.com/index.php/ro/article/view/1037.