Syversen, Unni, Michel Mignon, Serge Bonfils, Anne Kristensen, and Helge L Waldum. “Chromogranin a and Pancreastatin-Like Immunoreactivity in Serum of Gastrinoma Patients”. Acta Oncologica 32, no. 2 (January 1, 1993): 161–165. Accessed June 29, 2026. https://medicaljournalssweden.se/actaoncologica/article/view/34765.