The link between vitamin D deficiency and chronic lung disease is due to increased airway smooth muscle

维生素D缺乏是一个全球性的公共卫生问题。越来越明显的是，缺乏维生素D会增加慢性肺病的严重程度。在这项研究中，我们建议研究一种机制，我们认为可以清楚地解释这种联系。这些研究对于了解关键营养素缺乏如何影响慢性肺部疾病至关重要，并将为指导公共卫生政策以减轻社区疾病负担提供必要的数据。

Vitamin D deficiency is a global public health problem. It is becoming increasingly evident that vitamin D deficiency increases the severity of chronic lung disease. In this study we propose to examine a mechanism that we think clearly explains this association. These studies are critical to understanding how deficiencies in key nutrients can impact on chronic lung disease and will provide the data necessary to guide public health policy to reduce the burden of disease in the community.