[1] Southern Med Coll, Dept Med, Chittagong, Bangladesh
[2] Lady Reading Hosp, Dept Med, Peshawar, Pakistan
[3] Jinnah Sindh Med Univ, Dept Med, Karachi, Pakistan
[4] Shifa Coll Med, Dept Med, Islamabad, Pakistan
[5] Fatima Mem Hosp, Dept Med, Lahore, Pakistan
[6] Muhammad Hosp, Dept Med, Lahore, Pakistan
[7] Cardiovasc Analyt Grp, Dept Cardiovasc Med, Islamabad, Pakistan