Ömer Özçağlayan, Tuğba İlkem Kurtoğlu Özçağlayan, Mücahit Doğru, and Rafet Mete, “Vagus nerve assessment via ultrasonography in irritable bowel syndrome. Are there any changes of dimension in the vagus nerve?”, Turkish Journal of Gastroenterology, vol. 31, no. 7, pp. 503–507, Apr. 2020.