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APA Citation
Razek, A. A., Khalek, A. M., Elwakeel, H., & Ebrahim, M. A. (2019). inter-observer agreement of color duplex ultrasound of central vein stenosis in hemodialysis patients. Phlebology, 34, 636–642. http://access.bl.uk/ark:/81055/vdc_100087901971.0x000018