@article{yildirim_yildirim_muhcu_2026,  title={Low pregnancy-associated plasma protein-A and serum urotensin-II in 11–14 weeks gestation: case-control study},  volume={72},  ISSN={0104-4230},  url={https://doi.org/10.1590/1806-9282.20260478},  DOI={10.1590/1806-9282.20260478},  number={8},  journal={Revista da Associação Médica Brasileira},  publisher={Associação Médica Brasileira},  author={Yildirim, Yusa Irfan and Yildirim, Rojda Bayar and Muhcu, Murat},  year={2026},  pages={e20260478} }