Research Article Persistent tardive dyskinesia. Br Med J 1971; 3 doi: https://doi.org/10.1136/bmj.3.5774.572 (Published 04 September 1971) Cite this as: Br Med J 1971;3:572 Article Related content Metrics Responses Peer review Related articles No related articles found. See more Higher levels of mercury in brain are not linked to increased risk of Alzheimer’s, study finds BMJ February 03, 2016, 352 i611; DOI: https://doi.org/10.1136/bmj.i611 New mental health bill is tabled in the Indian parliament BMJ February 13, 2014, 348 g1507; DOI: https://doi.org/10.1136/bmj.g1507 Frontotemporal dementia BMJ August 06, 2013, 347 f4827; DOI: https://doi.org/10.1136/bmj.f4827 Higher iron concentrations may protect against Parkinson’s disease BMJ June 12, 2013, 346 f3691; DOI: https://doi.org/10.1136/bmj.f3691 Suspected early dementia BMJ September 20, 2011, 343 d5568; DOI: https://doi.org/10.1136/bmj.d5568