Machine learning for rectal cancer prediction based on metabolic changes on amino acids - José Tavares; Pedro Brandão; Ivo Barros; José Gonçalves; Isabel Praça; Lucia Lacerda; Marisa Santos (36th IEEE International Symposium on Computer-Based Medical Systems, CBMS 2023, L'Aquila, Italy, June 22-24, 2023, 2023)