Dr. Shagun, Dr. Sunil Sharma, Dr. Malay Sarkar, and Dr. RS Negi. “Smoking Index and Risk Gradient for Spontaneous Pneumothorax: Evidence from 111 Indian Patients”. International Journal of Pharmacy Research & Technology (IJPRT), vol. 15, no. 1, May 2025, pp. 548-50, https://www.ijprt.org/index.php/pub/article/view/422.