@article{martorina_tavares_2021,  title={Possible role of exogenous melatonin in preventing more serious COVID-19 infection in patients with type 2 diabetes mellitus},  volume={67},  ISSN={0104-4230},  url={https://doi.org/10.1590/1806-9282.67.Suppl1.20200968},  DOI={10.1590/1806-9282.67.Suppl1.20200968},  journal={Revista da Associação Médica Brasileira},  publisher={Associação Médica Brasileira},  author={Martorina, Wagner José and Tavares, Almir},  year={2021},  pages={18–21} }