Polyethylene glycol combined with lactulose has better efficacy than polyethylene glycol alone in bowel preparation before colonoscopy: A meta-analysis. Clinics, [S. l.], v. 78, p. 100172, 2023. DOI: 10.1016/j.clinsp.2023.100172. Disponível em: https://www.journals.usp.br/clinics/article/view/214056.. Acesso em: 8 may. 2024.