MOHAMMADI, Mahsa et al. Opium use and gastrointestinal cancers: a systematic review and meta-analysis study. Gastroenterology and Hepatology from Bed to Bench, [S. l.], v. 17, n. 2, 2024. DOI: 10.22037/ghfbb.v17i2.2882. Disponível em: https://journals.sbmu.ac.ir/ghfbb/index.php/ghfbb/article/view/2882. Acesso em: 10 aug. 2026.