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APA Citation
Seleq, S., Homsi, H., Khan, R., Gimpaya, N., Bansal, R., & Grover, S. C. (n.d.). s634 Global Trends in Training and Credentialing Guidelines for Gastrointestinal (GI) Endoscopy: A Systematic Review. American journal of gastroenterology, 117, e439. http://access.bl.uk/ark:/81055/vdc_100169531869.0x000055