@article{pak_üstün_sengul_2021, title={Botulinum toxin type A wear-off phenomenon in chronic migraine patients: how long does the maximum efficiency last?}, volume={79}, ISSN={0004-282X}, url={https://doi.org/10.1590/0004-282X-ANP-2020-0542}, DOI={10.1590/0004-282X-ANP-2020-0542}, number={10}, journal={Arquivos de Neuro-Psiquiatria}, publisher={Academia Brasileira de Neurologia - ABNEURO}, author={PAK, Aygul Tantik and ÜSTÜN, İsmet and SENGUL, Yildizhan}, year={2021}, month={Oct}, pages={886–890} }