Chronic thyroiditis as a favorable prognostic factor in papillary thyroid carcinoma. - Kashima,K.; Yokoyama,S.; Noguchi,S.; Murakami,N.; Yamashita,H.; Watanabe,S.; Uchino,S.; Toda,M.; Sasaki,A.; Daa,T.; Nakayama,I. (Thyroid, 1998)