1. A novel classification system for patients with PTC: addition of the new variables of large (3 cm or greater) nodal metastases and reclassification during the follow-up period;Sugitani;Surgery,2004
2. An expanded view of risk group definition in differentiated thyroid carcinoma;Cady;Surgery,1988
3. Ipsilateral lobectomy versus bilateral lober resection in papillary thyroid carcinoma: a retrospective analysis of surgical outcome using a novel prognostic score system;Hay;Surgery,1987
4. Predicting outcome in papillary thyroid carcinoma: development of a reliable prognostic scoring system in a cohort of 1779 patients surgically treated at one institution during 1940 through 1989;Hay;Surgery,1993
5. Risk group stratification and prognostic factors in papillary carcinoma of thyroid;Shaha;Ann Surg Oncol,1996