Ibiapina Ferreira Costa S. Reasons for a medicine for needy populations: DOI: 10.15343/0104-7809.200731.2.7. Mundo Saude [Internet]. 2007 Apr. 1 [cited 2024 Dec. 18];31(2):196-201. Available from: https://revistamundodasaude.emnuvens.com.br/mundodasaude/article/view/895