Sultan, D. M.; Akhtar, D. K.; Begum, D. H. Z.; Mahmood, D. A.; Sadiq, D. N.; Shah, D. S. A. A.; Ahmed, D. A. EXPERIENCE OF ATRIAL SEPTAL DEFECT DEVICE CLOSURE IN PATIENTS MORE THAN FIFTY YEARS OF AGE. PAFMJ 2019, 69, S11-4.