Portincasa, Piero, Annamaria Maggipinto, Massimo Berardino, Leonilde Bonfrate, Simona Costin, Orlando Todarello, Giuseppe Palasciano, David Q.-H. Wang, and Dan L. Dumitrascu. “Assessing Gastrointestinal Symptoms and Perception, Quality of Life, Motility, and Autonomic Neuropathy in Clinical Studies”. Journal of Gastrointestinal and Liver Diseases 18, no. 2 (June 1, 2009). Accessed July 13, 2026. https://www.jgld.ro/jgld/index.php/jgld/article/view/2009.2.12.