2 Simões-Pereira J, Ferreira TC, Limbert E, Cavaco BM, Leite V2021Outcomes of thyrotropin alfa versus levothyroxine withdrawal-aided radioiodine therapy for distant metastasis of papillary thyroid cancer. B Dear Editor: b We appreciate the interest of Dr. Kao ([1]) in our article, "Outcomes of Thyrotropin Alfa Versus Levothyroxine Withdrawal-Aided Radioiodine Therapy for Distant Metastasis of Papillary Thyroid Cancer", which was recently published in I Thyroid i ([2]).