Ishaq N, Iqbal Z, Zaidi SU, Tufail S, Mahtab F, Qammar SM. Comparison of Caffeine and Nicotine on Sleep Quality of Male Medical Students of Quaid-e-Azam Medical College, Bahawalpur. Proceedings S.Z.M.C [Internet]. 2026 Jul. 8 [cited 2026 Sep. 14];40(2):208-13. Available from: https://proceedings-szmc.org.pk/index.php/szmc/article/view/824