Piñar Morales R, Todorova Petrova M, Barrero Hernández FJ. Copresence of myasthenia gravis and neuromyelitis optica: 2 case reports. Neurologia (Engl Ed). 2021 Mar;36(2):174-176. English, Spanish. doi: 10.1016/j.nrl.2020.02.008. Epub 2020 Jun 18. PMID: 32565034.