Primary progressive aphasia: six questions in search of an answer.

"Declarations Conflicts of interestThe authors declare they have no conflicts of interest. Ethical standardResearch studies relevant to this work have been approved by the London—Queen Square Research Ethics Committee and conducted in accordance with the ethical standards laid down in the 1964 Declaration of Helsinki and its later amendments. All research participants gave informed consent prior to their inclusion in the studies. Conflicts of interest The authors declare they have no conflicts of interest."

"This work was supported by the Alzheimer’s Society, Alzheimer’s Research UK, the UK Dementia Research Institute at UCL, the National Institute for Health Research University College London Hospitals Biomedical Research Centre and the National Brain Appeal (Frontotemporal Dementia Research Studentship in Memory of David Blechner). CJDH and CRM are supported by a NIHR [Invention for Innovation (NIHR204280)] grant and CJDH received a Wellcome Institutional Strategic Support Fund Award (204841/Z/16/Z). AV is supported by a NIHR Advanced Fellowship NIHR302240. JDR has been supported by a Miriam Marks Brain Research UK Senior Fellowship, a Medical Research Council Clinician Scientist Fellowship (MR/M008525/1) and the National Institute for Health Research Rare Disease Translational Research Collaboration (BRC149/NS/MH). JDW is supported by the Alzheimer’s Society, Alzheimer’s Research UK, the Royal National Institute for Deaf People (Discovery Grant G105_WARREN) and the National Institute for Health Research University College London Hospitals Biomedical Research Centre. This research was funded in part by UKRI and Wellcome Trust (Grant 204841/Z/16/Z). For the purpose of Open Access, the authors have applied a Creative Commons Attribution (CC BY) public copyright licence to any Author Accepted Manuscript version arising from this submission. The views expressed are those of the authors and not necessarily those of the NIHR or the Department of Health and Social Care."