65.有關甲狀腺機能低下(hypothyroidism)之成因,下列何者錯誤? (A)甲狀腺全切除(total thyroidectomy) (B)葛瑞夫茲氏病(Graves disease) (C)橋本氏甲狀腺炎(Hashimoto thyroiditis) (D)腦下垂體功能低下(hypopituitarism)