@article{hamada_esteves_nizza_agarwal_2012,  title={Unexplained Male infertility: diagnosis and Management},  volume={38},  ISSN={1677-5538},  url={https://doi.org/10.1590/S1677-55382012000500002},  DOI={10.1590/S1677-55382012000500002},  number={5},  journal={International braz j urol},  publisher={Sociedade Brasileira de Urologia},  author={Hamada, Alaa and Esteves, Sandro C. and Nizza, Mark and Agarwal, Ashok},  year={2012},  month={Sep},  pages={576–594} }