Oc, M., Farsak, B., Oc, B., Yildirim, S. and Simsek, M. 2012. Extremely Low Birth Weight Infants with Patent Ductus Arteriosus: Searching for the Least Invasiveness. The Heart Surgery Forum. 15, 6 (Dec. 2012), E302-E304. DOI:https://doi.org/10.1532/HSF98.20121069.