Overview Phase 2 Trial of Donafenib in 131I-Refractory Differentiated Thyroid Cancer Status: Completed Trial end date: 2018-12-01 Target enrollment: Participant gender: Summary Donafenib for advanced 131I-refractory/resistant differentiated thyroid cancer(DTC). Phase: Phase 2 Details Lead Sponsor: Suzhou Zelgen Biopharmaceuticals Co.,Ltd