1. Cancer statistics registrations: registrations of cancer diagnosed in 2002, England. Series MB1 no.33;Office for National Statistics,2005
2. Long term impact of initial surgical and medical therapy on papillary and follicular thyroid cancer;Mazzaferri;Am J Med,1994
3. Papillary thyroid microcarcinoma: a study of 535 cases observed in a 50-year period;Hay;Surgery,1992
4. British Thyroid Association. Guidelines for the management of thyroid cancer in adults. London: British Thyroid Association, Royal College of Physicians; March 2002 [April 2007].