I. P. A. das Virgens, A. L. M. de Carvalho, Y. G. Nagashima, F. M. Silva, and A. P. T. Fayh, “Is perioperative fasting associated with complications, length of hospital stay and mortality among gastric and colorectal cancer patients? A cohort study”, Sao Paulo Med J, vol. 138, no. 5, pp. 407–413, Oct. 2020.