White matter tract signatures of the progressive aphasias.

"Disclosure statement The authors declare no actual or potential conflicts of interest. Ethical approval for the study was obtained from the local institutional ethics committee and all subjects gave written informed consent to participate in accordance with the Declaration of Helsinki."

"We thank all subjects for their participation. This work was undertaken at UCLH/UCL who received a proportion of funding from the Department of Health's NIHR Queen Square Dementia BRU funding scheme. The Dementia Research Centre is an Alzheimer's Research UK Co-ordinating Centre. This work was also funded by the Medical Research Council UK and by the Wellcome Trust (091673/Z/10/Z). C.J.M. is supported by an MRC programme grant. N.C.F. is a NIHR senior investigator. J.D.W. is supported by a Wellcome Trust Senior Clinical Fellowship (Grant No 091673/Z/10/Z)."