Percutaneous closure of perimembranous ventricular septal defect using patent ductus arteriosus occluders. oleh Hieu Lan Nguyen, Quang Tan Phan, Dung Duc Doan, Linh Huynh Dinh, Hieu Ba Tran, Saima Sharmin, Julian Johny Thottian, Hoyoun Won, Wang Soo Lee, Seung Yong Shin, Truong Quang Nguyen, Sang Wook Kim