C. Szlejf, J. M. Farfel, J. A. Curiati, E. de B. Couto Junior, W. Jacob-Filho, and R. S. Azevedo, “Medical adverse events in elderly hospitalized patients: a prospective study”, Clinics, vol. 67, no. 11, pp. 1247–1252, Nov. 2012, doi: 10.6061/clinics/2012(11)04.