J. dos Santos, D. D. C. de F. Mota, and C. A. de M. Pimenta, “Comorbidities between fatigue and depression in patients with colorectal cancer”, Rev. Esc. Enferm. USP, vol. 43, no. 4, pp. 909–914, Dec. 2009, doi: 10.1590/S0080-62342009000400024.