TI - Percutaneous closure of second secundum atrial septal defect under guidance of three-dimensional transesophageal echocardiography guidance AU - Demirkol, S. AU - Barçın, C. AU - Balta, Ş. AU - Ünlü, M. SO - The Anatolian Journal of Cardiology 2013;13:5022-5023. DO - 10.5152/akd.2013.129