Fragkou, Paraskevi C, Ioannis A Papadopoulos, Antonios Papadopoulos, Evangelos-Achilleas Kontoveros, Gregory Kaltsas, and Foula Vassilara. “Rare Presentation of a Metastatic Pancreatic Neuroendocrine Neoplasm Presenting With Atrial Flutter”. European Journal of Case Reports in Internal Medicine 8, no. 1 (January 20, 2021). Accessed April 29, 2024. https://www.ejcrim.com/index.php/EJCRIM/article/view/2216.