Caldeira, A., E. Calmeiro, C. Moreno, G. Bragança, R. Gonçalves, and R. Silva. 2008. “A Retrospective Study of Diabetic Gastroparesis in a Diabetic Population”. Internal Medicine 15 (4). Lisboa, Portugal:245-48. https://revista.spmi.pt/index.php/rpmi/article/view/1484.