Development, Characterization and Cell Viability Inhibition of PVA Spheres Loaded with Doxorubicin and 4′-Amino-1-Naphthyl-Chalcone (D14) for Osteosarcoma oleh Viviane Seba, Gabriel Goetten de Lima, Bruno L. Pereira, Gabriel Silva, Luiza Steffens Reinhardt, Pablo Ricardo Arantes, Bor Shin Chee, Mariana Bastos dos Santos, Suzelei C. França, Luis Octavio Regasini, Ana Lúcia Fachin, Zhi Cao, Michael J. D. Nugent, Mozart Marins