Costa, A.F., Baetas, A.C.F.R., Oliveira, A.V., Guinhazi, N.P., Pimenta, R. de S.M., Coelho, R.A., Oliveira, A.P.S., Maneschy, R.B. and Garcia, H.C.R. 2020. Diagnosis and treatment of acute lower gastrointestinal bleeding: systematic review. Pará Research Medical Journal. 4, (Jun. 2020), 1–7. DOI:https://doi.org/10.4322/prmj.2019.036.