A Guide for Pain Management in Developing Nations: The Diagnosis and Assessment of Pain in Cancer Patients. Journal of Cancer Research Updates, [S. l.], v. 5, n. 1, p.  29–44, 2016. DOI: 10.6000/1929-2279.2016.05.01.6. Disponível em: https://www.neoplasiaresearch.com/index.php/jcru/article/view/652. Acesso em: 16 apr. 2026.