MAHMOOD, K.; NAQVI, I. H.; AHMED, G.; MAHBOOB, A.; BAIG, N.; JUMMA, M. SNUFFED TOBACCO MIGHTIER THAN SMOKED TOBACCO: FREQUENCY DETERMINATION OF UPPER AND LOWER RESPIRATORY TRACT DISEASES. Pakistan Journal of Chest Medicine, [S. l.], v. 21, n. 2, p. 54–60, 2015. Disponível em: https://pjcm.net/index.php/pjcm/article/view/323. Acesso em: 20 apr. 2026.