Value of 18F-FDG-PET/PET-CT in differentiated thyroid carcinoma with radioiodine-negative whole-body scan: a meta-analysis - Dong, M-J; Lui, Z-F; Zhao, K; Ruan, L-X; Wang, G-L; Yang, S-Y; Sun, F; Luo, X-G (Nucl Med Commun, 2009)