Safety and efficacy of Amplatzer duct occluder II and konar-MF™ VSD occluder in the closure of perimembranous ventricular septal defects in children weighing less than 10 kg oleh Kaan Yildiz, Nazmi Narin, Sedef Oksuz, Rahmi Ozdemir, Ozge Pamukcu, Ali Baykan, Abdullah Ozyurt, Sedat Bagli, Rasit Aktas, Ikbal Nur Safak, Muhammed Akif Atlan, Yunus Sezer Bayam, Cem Karadeniz