Covariance matrix and R lavaan script accompanying the paper: Fuhrmann, D., Nesbitt, D., Shafto, M., Rowe, J., Price, D., Gadie, A., Cam-CAN & Kievit, R. A.(2018). Strong and specific associations between cardiovascular risk factors and brain white matter microstructure- and macrostructure in healthy aging. Neuobiology of Aging, doi: 10.1016/j.neurobiolaging.2018.10.005