Yu-Qin He, Xin Fu, Dong-Feng Chen, and Dong-Feng Chen. 2019. “Rare Cause of Severe Hematemesis Due to IgG4-Related Gastric Ulcer”. Turkish Journal of Gastroenterology 30 (10):925-27. https://tjg.avesjournals.com/index.php/tjg/article/view/3791.