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APA Citation
Linn, S., Haeri, N. S., Lopez‐Morra, H., Tejada, J., Nigar, S., Giashuddin, S., Chow, J., Krishnaiah, M., & Anand, S. (n.d.). signet Ring Cell Adenocarcinoma of Ampulla of Vater: A Rare Case With Concurrent Non‐gastrointestinal Malignancies. American journal of gastroenterology, 110, . http://access.bl.uk/ark:/81055/vdc_100123022655.0x000059