In vivo microstructural heterogeneity of white matter and cognitive correlates in aging using tissue compositional analysis of diffusion magnetic resonance imaging.

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"CONFLICT OF INTEREST STATEMENT There is no conflict of interest."

"This study was funded by the Swedish Foundation for Strategic Research (SSF); the Strategic Research Programme in Neuroscience at Karolinska Institutet (StratNeuro); the Swedish Research Council (VR); the regional agreement on medical training and clinical research (ALF) between Stockholm County Council and Karolinska Institutet; Center for Medical Innovation (CIMED); the Swedish Alzheimer Foundation; the Swedish Brain Foundation; the Swedish Parkinson's foundation (Parkinsonfonden); King Gustaf V:s and Queen Victorias Foundation; Demensfonden; Stiftelsen Olle Engkvist Byggmästare; Birgitta och Sten Westerberg; Foundation for Geriatric Diseases at Karolinska Institutet; Loo och Hans Ostermans stiftelse för medicinsk forskning; Stiftelsen Gamla Tjänarinnor; Gun & Bertil Stohnes Stiftelse; and Neuro‐fonden. The authors would like to thank Dr. Antonio Rodríguez for providing access to participants and helpful assistance; the Servicio de Resonancia Magnética para Investigaciones Biomédicas del SEGAI (University of La Laguna, Spain); and Lucio Diaz‐Flores for radiological assessment of the MRI scans. Data used in preparation of this article are part of the GENIC database (Group of Neuropsychological Studies of the Canary Islands, University of La Laguna, Spain. Principal investigators: Dr. José Barroso and Dr. Daniel Ferreira. Contact: Dr. Daniel Ferreira, daniel.ferreira.padilla@ki.se). The following collaborators contributed to the GENIC database but did not participate in analysis or writing of this report (in alphabetic order by family name): Rut Correia, Patricia Diaz, Aida Figueroa, Nerea Figueroa, Eloy García, Lissett González, Teodoro González, Zaira González, Cathaysa Hernández, Edith Hernández, Nira Jiménez, Judith López, Cándida Lozano, Alejandra Machado, Yaiza Molina, María Antonieta Nieto, Roraima Pérez, María Sabucedo, Elena Sirumal, Marta Suárez, Manuel Urbano, and Pedro Velasco."