Scarlatti, K. C.; Michel, J. L. M.; Gamba, M. A.; Gutiérrez, M. G. R. de. Pressure Ulcers in Surgery Patients: Incidence and Associated Factors. Rev. Esc. Enferm. USP 2011, 45 (6), 1372-1379. https://doi.org/10.1590/S0080-62342011000600014.