Çağdaş Kalkan, Fatih Karakaya, and İrfan Soykan. “Factors Associated With Elevated Serum Chromogranin A Levels in Patients With Autoimmune Gastritis ”. Turkish Journal of Gastroenterology 27, no. 6 (July 25, 2019): 515–520. Accessed July 18, 2025. https://turkjgastroenterol.avesjournals.com/index.php/tjg/article/view/3322.