@article{miyaoka_esteves_2013,  title={Predictive factors for sperm retrieval and sperm injection outcomes in obstructive azoospermia: do etiology, retrieval techniques and gamete source play a role?},  volume={68},  ISSN={1807-5932},  url={https://doi.org/10.6061/clinics/2013(Sup01)12},  DOI={10.6061/clinics/2013(Sup01)12},  journal={Clinics},  publisher={Faculdade de Medicina / USP},  author={Miyaoka, Ricardo and Esteves, Sandro C.},  year={2013},  pages={111–119} }