Delivanis DA, Bancos I, Atwell TD, Schmit GD, Eiken PW, Natt N, Erickson D, Maraka S, Young WF, Nathan MA. Diagnostic performance of unenhanced computed tomography and 18 F-fluorodeoxyglucose positron emission tomography in indeterminate adrenal tumours. Clin Endocrinol (Oxf). 2018 Jan; 88(1):30-36.