E. C. de Carvalho, E. C. Cárnio, V. Y. Khouri, C. Guilherme, C. B. dos Santos, and M. A. Pace, “ Examination of the oral cavities of patients with cancer: clinical evaluation and indirect measurement of the nitric oxide level ”, Rev. Esc. Enferm. USP, vol. 47, no. 1, pp. 101–106, Feb. 2013, doi: 10.1590/S0080-62342013000100013.