Kawamura, Ren, Yukinori Harada, and Taro Shimizu. “Missed Diagnosis of Cholangiocarcinoma Presenting With Atypical Symptoms ”. European Journal of Case Reports in Internal Medicine 8, no. 1 (January 26, 2021). Accessed May 5, 2024. https://www.ejcrim.com/index.php/EJCRIM/article/view/2207.