Aziz, Danish Abdul, Aiza Abbas, Werdah Viquar, and Ali Munawar Hussain. “Association of Vitamin D Levels and Asthma Exacerbations in Children and Adolescents: Experience from a Tertiary Care Center”. Monaldi Archives for Chest Disease 93, no. 1 (May 24, 2022). Accessed April 29, 2024. https://www.monaldi-archives.org/macd/article/view/2230.