Knowledge and attitudes toward the clinical usage of e-cigarettes among medical students in a public sector university of Karachi - Fatima, Mehreen; Najib, Mahnoor; Arsha, Qarsam; Ali, Nargis; Zulfiqar, Saba; Mashriqi, Muhammad Abdullah; Shah, Adil; Khan, Yumna (Annals of Jinnah Sindh Medical University, 2026)