Corrigendum to "Defining risk groups of patients with cancer of unknown primary site and cervical nodal metastases by F-18 fluorodeoxyglucose positron emission tomography and computed tomography imaging" [Kaohsiung J Med Sci 32 (08) (2016) 407-413].

a Department of Nuclear Medicine, Chang Gung Memorial Hospital at Linkou, Taoyuan, Taiwan b Department of Medical Oncology, Chang Gung Memorial Hospital at Linkou, Taoyuan, Taiwan c Department of Head and Neck Oncology Group, Chang Gung Memorial Hospital at Linkou, Taoyuan, Taiwan d Department of Otorhinolaryngology, Head and Neck Surgery, Chang Gung Memorial Hospital at Linkou, Taoyuan, Taiwan e Department of Radiation Oncology, Chang Gung Memorial Hospital at Linkou, Taoyuan, Taiwan f Department of Nuclear Medicine and Molecular Imaging Center, Chang Gung Memorial Hospital at Linkou, Taoyuan, Taiwan