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APA Citation
Bu, H., Yang, Y., Wu, Q., Zhang, W., Hu, S., & Zhao, T. (n.d.). echocardiography-guided transcatheter closure of perimembranous ventricular septal defects without arterial access:a fluoroscopy-free technique for alternative use in children. European heart journal, 41, . http://access.bl.uk/ark:/81055/vdc_100117806953.0x000049