Thyrotropin suppression and disease progression in patients with differentiated thyroid cancer: results from the National Thyroid Cancer Treatment Cooperative Registry. - Cooper,D.S.; Specker,B.; Ho,M.; Sperling,M.; Ladenson,P.W.; Ross,D.S.; Ain,K.B.; Bigos,S.T.; Brierley,J.D.; Haugen,B.R.; Klein,I.; Robbins,J.; et al. (Thyroid, 1998)