- to know the epidemiological data regarding Vit D in connection with asthma

- to learn about the roles of Vit D in the development of the lung and about the hypotheses on the causative role of Vit D deficiency in the development of asthma

- to get  knowledge regarding the potential correlations between the levels of Vit D and different parameters of monitoring of clinical control of the disease

- to focus on the potential role of  Vit D in asthma treatment