Letter to the Editor: 'Euthyroid sick syndrome as an early surrogate marker of poor outcome in mild SARS‑CoV‑2 disease'-prognostic significance of non-thyroidal illness syndrome across the whole spectrum of COVID-19 severity

致编辑的信：“甲状腺功能正常疾病综合征作为轻症SARS-CoV-2感染预后不良的早期替代指标”——非甲状腺疾病综合征在COVID-19严重程度谱系中的预后意义