1. Department of Thyroid and Breast Surgery, The Second Affiliated Clinical School of Medicine, Fujian Medical University, Quanzhou, Fujian 362000, P.R. China
2. Department of Endocrinology, No. 910th Hospital of The People's Liberation Army Joint Logistics Support Force, Quanzhou, Fujian 362000, P.R. China
3. Department of General Family Medicine, Jinshang Town Health Center, Quanzhou, Fujian 362000, P.R. China