@article{üstün özek_2022, title={A study on the correlation between pain frequency and severity and vitamin B12 levels in episodic and chronic migraine}, volume={80}, ISSN={0004-282X}, url={https://doi.org/10.1590/0004-282X-ANP-2021-0192}, DOI={10.1590/0004-282X-ANP-2021-0192}, number={6}, journal={Arquivos de Neuro-Psiquiatria}, publisher={Academia Brasileira de Neurologia - ABNEURO}, author={Üstün Özek, Sibel}, year={2022}, month={June}, pages={586–592} }