NANDHINI PRIYA.M, and PURUSHOTHAMAN.S. 2018. “Efficacy, Safety and Cost Effectiveness of Oral Doxofylline and Theophylline for Mild to Moderate Persistent Bronchial Asthma: A Randomized Prospective Open Labeled Comparative Study”. International Journal of Pharma and Bio Sciences 9 (2):51-56. https://doi.org/10.22376/ijpbs.2018.9.2.pr51-56.