Begum, JA, MI Islam, MZ Hossain, and RN Chowdhury. “Exhaled Nitric Oxide: A New Lung Function Test”. Journal of Dhaka Medical College 18, no. 2 (October 12, 2010): 166–168. Accessed November 21, 2024. https://banglajol.info/index.php/JDMC/article/view/6280.