1. Department of Thyroid and Neck Tumor; Tianjin Medical University Cancer Institute and Hospital; Tianjin 300060 China
2. Department of Neuro-Oncology; University of Texas MD Anderson Cancer Center; Houston Texas 77025
3. Laboratory for Cellular and Molecular Thyroid Research; Division of Endocrinology; Diabetes and Metabolism; The Johns Hopkins University School of Medicine; Baltimore Maryland 21287