DAWOOD, Ali Adel. The main reasons why cancer is so difficult to treatment. Universidad Médica Pinareña, [S. l.], v. 18, n. 2, p. e605, 2020. Disponível em: https://revgaleno.sld.cu/index.php/ump/article/view/605. Acesso em: 19 abr. 2025.