@article{maestroni_conti_pierpaoli_1987,  title={The pineal neurohormone melatonin and its physiologic opiatergic immunoregulatory role},  volume={82},  ISSN={0074-0276},  url={https://doi.org/10.1590/S0074-02761987000600012},  DOI={10.1590/S0074-02761987000600012},  journal={Memórias do Instituto Oswaldo Cruz},  publisher={Instituto Oswaldo Cruz, Ministério da Saúde},  author={Maestroni, Georges J. M. and Conti, Ario and Pierpaoli, Walter},  year={1987},  pages={75–79} }