@article{maltz_2009,  title={Preface: over-the-counter preventive and therapeutic oral products},  volume={23},  ISSN={1806-8324},  url={https://doi.org/10.1590/S1806-83242009000500002},  DOI={10.1590/S1806-83242009000500002},  journal={Brazilian Oral Research},  publisher={Sociedade Brasileira de Pesquisa Odontológica - SBPqO},  author={Maltz, Marisa},  year={2009},  month={Jun},  pages={4–7} }