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APA Citation
Warraich, M. S., Majeed, M. B., Bashar, A., Gandhi, S., Khaqan, M. A., Liaqat, S., & Khalid, S. (n.d.). s3548 Utility of Upper Endoscopy in Immunocompromised Patients Presenting With Dysphagia. American journal of gastroenterology, 116, S1456. http://access.bl.uk/ark:/81055/vdc_100144523576.0x00002f