1. Grant CS, Hay ID, Gough IR, et al. Long term follow up of patients with benign thyroid fine needle aspiration cytologic diagnoses. Surgery. 1989;106:980-986.
2. Cusick EL, MacIntosh CA, Krukowski ZH, et al. Management of isolated thyroid swellings: a prospective six year study of fine needle aspiration cytology in diagnosis. Br J Med. 1990;301:318-321.
3. de los Santos ET, Keyhani-Rofagha S, Cunningham JJ, et al. Cystic thyroid nodules: the dilemma of malignant lesions. Arch Intern Med. 1990;150:1422-1427.
4. Gharib H, Goellner JR, Johnson DA. Fine-needle aspiration cytology of the thyroid: a 12-year experience with 11,000 biopsies. Clin Lab Med. 1993;13:699-709.
5. Hamburger JI, Hussain M. Semiquantitative criteria for fineneedle biopsy diagnosis: reduced false negative diagnoses. Diagn Cytopathol. 1988;4:14-17.