Arhlund, L., Nilsson, O., Kling-Petersen, T., Wigander, A., Theodorsson, E., Dahlstroum, A., & Ahlman, H. (1989). Serotonin-Producing Carcinoid Tumour Cells in Long-Term Culture Studies on serotonin release and morphological features. Acta Oncologica, 28(3), 341–346. https://doi.org/10.3109/02841868909111204